What are the most common issues with a Porsche 928?
To avoid costly repairs down the road, routine maintenance is required. We’ll cover both in our guide and help keep you on the road longer and more reliably. One of the most common issues Porsche 928 owners report is failure of the engine thrust bearing in automatic transmission equipped cars.
Can a Porsche 928 be driven in limp home mode?
It is not recommended to drive the car for an extended period of time in limp-home mode. The 928 utilizes a throttle position switch (TPS) to make fueling and ignition timing adjustment based on throttle input. The TPS has a setting for idle and a setting for wide-open throttle which is only activated at about 3/4 throttle input.
Is there a 1987 Porsche 928 S4 for sale?
Gateway Classic Cars of Philadelphia is presenting a 1987 Porsche 928 S4 For Sale. The 928 S4 debuted towards the end of 1986 as a 1987 model. An updated version of the 5.0 L V8 producing 316 hp an… More Info › Gateway Classic Cars of St. Louis is proud to present this custom 1983 Porsche 928S!
Where is the MAF located on a Porsche 928?
928 models fitted with Lh-jetronic injections systems utilize a mass airflow or MAF sensor to measure the amount of air entering the engine. The MAF is located between the airbox and throttle body. It uses a very fine platinum wire that is electronically heated, but cooled by the airlfow across it.
What to do when transmission slips in Porsche 928?
Condition: Transmission slips in all selector lever positions Correction: 1, Check modulating pressure, adjusting if necessary. If not adjustable, check movement of modulating pressure control valve. Clean modulating pressure safety valve in shift valve housing upper section, 2. Check whether vacuum line from intake branch to vacuum box is plugged.
When to replace fuse box on 1977 Porsche 928?
The fuse box on a 1977 Porsche 928. Timing belts and water pumps on the Porsche 928 are good for around 50,000 miles but should be replaced no later than that point. Failure of the timing belt can cause serious engine damage on post-1985 models, and some have reported failure in as few as 15,000 miles.
When to replace timing belt on Porsche 928?
Post-1985 cars have 32 valve inference engines, and the engine valves themselves will bend if a timing belt slips or breaks, hence the warning light. Even if you don’t drive the car that much, replacing the belt every five to seven years is a good idea as they dry up with age.
To avoid costly repairs down the road, routine maintenance is required. We’ll cover both in our guide and help keep you on the road longer and more reliably. One of the most common issues Porsche 928 owners report is failure of the engine thrust bearing in automatic transmission equipped cars.
What does belt tension warning light on Porsche 928 mean?
Whether you receive a belt tension warning light or not, be sure and check tension regularly and retension the belt to proper specs when needed. Post-1985 cars have 32 valve inference engines, and the engine valves themselves will bend if a timing belt slips or breaks, hence the warning light.
Post-1985 cars have 32 valve inference engines, and the engine valves themselves will bend if a timing belt slips or breaks, hence the warning light. Even if you don’t drive the car that much, replacing the belt every five to seven years is a good idea as they dry up with age.
The fuse box on a 1977 Porsche 928. Timing belts and water pumps on the Porsche 928 are good for around 50,000 miles but should be replaced no later than that point. Failure of the timing belt can cause serious engine damage on post-1985 models, and some have reported failure in as few as 15,000 miles.
Where are the ground wires on a Porsche 928?
One is at the top of the “O” in the word Porsche cast into the cam cover — and it may be covered-up by the emissions air injection valve/hose. The second attachment point on the cam cover is more visible and is closer to front of car. Point 10 For later Euro cars, look for ground wires attached to the back of cam gear metal rear covers.
What’s the top speed of a 1985 Porsche 928?
Faster transportation, simply put, is better transportation. By the speediness criterion, the 1985 Porsche 928S is a substantial improvement over its predecessor. Top speed is up 10 mph, to 154.
Whether you receive a belt tension warning light or not, be sure and check tension regularly and retension the belt to proper specs when needed. Post-1985 cars have 32 valve inference engines, and the engine valves themselves will bend if a timing belt slips or breaks, hence the warning light.
Why is my Porsche 928 window switch not working?
If you also test the window relay with a voltmeter and it has power, you can narrow the problem to a faulty motor. Also, if the Porsche 928 window switch indicates low voltage, then that may also indicate a motor problem. Buying a new genuine power window motor for the Porsche 928 costs from $200 and upwards on eBay. Figure 2. Power window motor.
One is at the top of the “O” in the word Porsche cast into the cam cover — and it may be covered-up by the emissions air injection valve/hose. The second attachment point on the cam cover is more visible and is closer to front of car. Point 10 For later Euro cars, look for ground wires attached to the back of cam gear metal rear covers.
Why are my power windows not working on my Porsche 928?
But just wait until you drive into a sandstorm or in rain; then it becomes a matter of absolute necessity to have the Porsche 928 power windows working as they should. The power window system is complex, and when it’s faulty, its not easy to isolate the problem source.
What is the regulator on a Porsche 928?
The regulator is the harness anchoring the car windows, and its gears are rotated by the motor. If the motor is old and damaged, the whole power window system of the Porsche 928 gets crippled. If one of the windows is static when others move, it could be a motor problem.
How much does a Porsche 928 window switch cost?
Also, if the Porsche 928 window switch indicates low voltage, then that may also indicate a motor problem. Buying a new genuine power window motor for the Porsche 928 costs from $200 and upwards on eBay. Figure 2. Power window motor.
What’s the odometer on a 1985 Porsche 928?
1985 Porsche 928SThe 1985 Porsche 928S featured here with 21,077 miles on the odometer is available in its factory color code #961 Meteor Metallic with a red interior. It comes equipped with a 5-sp… More Info ›
What should I do if my Porsche 928 battery is bad?
Apply some moisture-barrier grease or spray to terminal ends and contact points as well. Intermittent hard starts, rough idle, poor performance, and bad gauge readings are all signs of bad ground points. Make sure the battery terminals are clean as well as the ground straps.
Is the gas in the ground on a Porsche 928?
Make sure your Porsche 928 is keeping its gas in the tank, not on the ground. This article applies to the Porsche 928 (1979-1995). As gearheads and car enthusiasts, we all love the smell of fuel.
Why does my Porsche 928 make a whistling noise?
There was a strange whistling noise from the center dash that I was led to believe was from a leaky diaphragm in the center dash area. I also sensed that the heat was on more than it should be.
Why is my gas tank leaking in my Porsche 928?
There are vent lines, fuel return lines, plus a few o-rings and seals that are part of the fuel tank assembly. It is completely possible, considering the age of Porsche 928s, that an o-ring needs to be replaced, or one of the many rubber lines that is part of the whole assembly.
Why is the heater on my Porsche 928 not working?
The fix for this turned out to be simple. The folks at Porsche designed the heater valve to fail open. This means you can get heat when you don’t want it. I found that there was a split in the vacuum line just as it attaches to the nipple on the heater valve.
Where is the fuse panel on a Porsche 928?
If a fuse blows repeatedly, please contact a qualified specialist workshop. The fuse panel is located below the dashboard.
What kind of refrigerant does a 928 S4 use?
During a Spring get-to-together of area 928 owners (details) we learned about R-12 to R-134a conversions. Our host mechanic Joel Roeder provided some history of the changes to refrigerant, and told how the newer oils are improving R-134a compatibility with our older R-12 systems.
What to do if your Porsche has a blown fuse?
Switch off the load with the defective fuse. Open the fuse box cover. Remove the corresponding fuse from its slot using the plastic gripper in order to check it. A blown fuse can be identified by the melted metal strip inside it. Replace only with fuses of the same rating.
Why does my Porsche 928 not want to start?
Having sort of resolved the issue of the 928 not wanting to start, I turned my attention to issues with the HVAC system. I knew from my first drive that things weren’t quite right.
What’s the best way to repair a Porsche 928?
A/c Summer Mod for heater valve 928 OC A/c vacuum A Arm (front) bushing Installation Alternator Replacement Bosch K Jetronic Brake Caliper Refinishing Brake Caliper Refurbish (Front) Brake Caliper Refurbish (Rear) Brake Fluid Flush Brake Pad replacement
If a fuse blows repeatedly, please contact a qualified specialist workshop. The fuse panel is located below the dashboard.
What kind of transmission does a Porsche 928 have?
The 928 was regarded as the more relaxing car to drive at the time. It came with either a five-speed dog leg manual transmission, or a Mercedes-Benz -derived automatic transmission, originally with three speeds, with four-speed from 1983 in North America and 1984 in other markets. More than 80% of the cars had the automatic transmission.
When did the Porsche 928 win Car of the Year?
Porsche’s design and development efforts paid off during the 1978 European Car of the Year, where the 928 won ahead of the BMW 7 Series, and the Ford Granada. The 928 is the only sports car so far to have won this competition, where the usual winners are mainstream hatchbacks and sedans/saloons from major European manufacturers.
What causes a bad start on a Porsche 928?
Intermittent hard starts, rough idle, poor performance, and bad gauge readings are all signs of bad ground points. Make sure the battery terminals are clean as well as the ground straps. Oxidation and corrosion can cause many electrical issues. There are also a lot of sensors in the 928 which the car relies on to gather signals.
Do you need routine maintenance on a Porsche 928?
Like any car, the 928 has its own unique quirks. However, these are very reliable cars for their age and type. To avoid costly repairs down the road, routine maintenance is required. We’ll cover both in our guide and help keep you on the road longer and more reliably.
Is the Porsche 928 a good car to buy?
Buying a Porsche 928 is an excellent way to experience the Porsche brand while getting a classic GT-style car that was largely under-appreciated during its lifespan. This article applies to the Porsche 928 (1978-1995). The Porsche 928, manufactured from 1978 to 1995, is an excellent car to purchase on the resale market.
What causes electrical issues in a Porsche 928?
Oxidation and corrosion can cause many electrical issues. There are also a lot of sensors in the 928 which the car relies on to gather signals. Corrosion causes problems with these signals and can lead to a variety of electrical issues as well. It’s a good idea to inspect, clean, and replace these components once a year. Figure 2.
How old is a 20 year old Porsche 928?
Most 20+ year old cars would be badly rusted out in the body and show signs of corrosion everywhere else, so the rubber lines would be the last thing to go. In these cars after 20+ years, the lines start to go and it’s sometimes the first indication of aging and sadly, it can be the last. Porsche 928s are expensive to maintain.
Are there any myths about the Porsche 928?
3 Common misunderstandings about the Porsche 928 The Porsche 928 is prone to engine fire The Porsche 928 is expensive to maintain The Porsche 928 is fat and slow About 18 months ago I found myself in a position to purchase a 1985 928.
How big is the bore on a Porsche 928?
Starting with a Porsche Alusil hypereutectic aluminum-silicon alloy engine block, Fausett had the OEM cylinder liners replaced with dry ductile-iron cylinder liners to accommodate the 4.125-inch bore (from the OEM 3.93-inch bore).
When to change timing belt on Porsche 928?
The 928 has a timing belt that should be changed along with the water Pump every 50K miles. The 16 valve engines pre -1985 are non interference engines and will not damage the engine if the belt breaks. I have never seen one really break, but the teeth do get chewed up causing the belt to slip accomplishing the same end result.
Why does my Porsche 928 engine keep failing?
There are many theories regarding why this part experiences common failure, but in general, the driveshaft puts excessive pressure on the flywheel and drive plate, which eventually wears away the thrust bearings in the engine.
Faster transportation, simply put, is better transportation. By the speediness criterion, the 1985 Porsche 928S is a substantial improvement over its predecessor. Top speed is up 10 mph, to 154.
What kind of wheels does a 1984 Porsche 928 have?
1984 PORSCHE 928S A driver’s luxury roadster. This 928S has been set up and tuned for the road. S-4 factory wheels w/ Falken rubber, Bilstein performance adjustable shocks.
What kind of power does a Porsche 928 have?
Originally intended as the successor to the 911, the 928 was Porsche’s high-performance 2+2 coupe, a sophisticated, front-engine, V-8 powered performer with an appeal that stretched across 18 model years. Depending on year and model, buyers can find 928s in a variety of specification, with power ranging from 219 to 350 horsepower.
What’s the odometer on a 1980 Porsche 928?
1980 Porsche 928 5-SpeedHere is a 1980 Porsche 928 5-Speed featured with 57,983 miles on the odometer is available in its factory color code #443 Copper Bronze Metallic with a sand beige interior. More Info › These vintage wagons can haul your gear, your friends, your kids, or just you, and are the ultimate accessory for the open road.
Where is the fill hole in a Porsche 928?
Buy about three feet of 3/8″ hose and a funnel that friction fits into it. 3/8″ hose friction fits between the battery box and the gas tank. One end in the fill hole in the transaxle the other end behind the car higher than the fill hole.
When did the Porsche 928 ECU repair start?
In 2005 Porsche 928 enthusiasts in the Netherlands under the name of “928-ecu-repair” started working on the protocols of this diagnostic system basically to understand and maybe develop an affordable and versatile diagnostic system.
Where is the injector harness on a Porsche 928?
They ground the engine electronics & the injector harness. One is at the top of the “O” in the word Porsche cast into the cam cover — and it may be covered-up by the emissions air injection valve/hose. The second attachment point on the cam cover is more visible and is closer to front of car.
Do you need to replace fuel line with 928rus?
928Rus sells a fuel line replacement kit. Includes all hoses that need replacing with all necessary clamps as well. This is one FIX that you need to do when you buy a car. Even when the hoses LOOK fine they are NOT.