Is the 1986 Porsche 928S Idles erratic after few minutes?
The PPI was good, the seller said it was running great in COLORADO. It starts ok, but after a few minutes it start to idle erratic and almost dies, then it drives like it is pulling a boat. After it stalls, it is very hard to start, but eventually it starts after 5 minutes. And the cycle continues.
Is the 1986 Porsche 928S a good car?
My 1986 928S was just brought over from Colorado to Florida. The PPI was good, the seller said it was running great in COLORADO. It starts ok, but after a few minutes it start to idle erratic and almost dies, then it drives like it is pulling a boat. After it stalls, it is very hard to start, but eventually it starts after 5 minutes.
What kind of spark control does a Porsche 928 use?
The Porsche 928 from the 1987 through the end of production in 1995 used separate Bosch Jetronic LH Fuel Injection and EZK Spark Control modules. The spark and fuel control systems obtain engine speed information from an inductive RPM sensor that connects to EZK module via pins 6 (-), 23 (+) and 24 (shielding).
Why is my Ford 928 not running at peak?
An idle problem is something you want to get checked out as soon as possible because it is certainly causing your 928 to not run at its peak. This includes lower gas mileage. Read on to discover the top four reasons that can be the cause of a rough idle in the 928.
The PPI was good, the seller said it was running great in COLORADO. It starts ok, but after a few minutes it start to idle erratic and almost dies, then it drives like it is pulling a boat. After it stalls, it is very hard to start, but eventually it starts after 5 minutes. And the cycle continues.
How does idle stabilizer work on Porsche 928?
Idle stabilizer valve. Early 928’s with CIS injection systems use a warm-up regulator to adjust fueling depending on engine temperature. This regulator sits atop the motor and uses engine heat to adjust the fuel plunger inside the fuel distributor and changes the fuel mixture. A faulty regulator will disrupt the correct fuel mixture to the engine.
My 1986 928S was just brought over from Colorado to Florida. The PPI was good, the seller said it was running great in COLORADO. It starts ok, but after a few minutes it start to idle erratic and almost dies, then it drives like it is pulling a boat. After it stalls, it is very hard to start, but eventually it starts after 5 minutes.
Why is my Porsche not idling at 675 rpm?
A very small change in any one of the various engine components can have a big effect on the way the car idles and drives. So, if your car is not idling at approximately 675 RPM, chances are something is not quite right. This article applies to the Porsche 928 (1978-1995).
When to replace timing belt on Porsche 928?
If all else fails in an attempt to start your 928, check for timing belt failure. The factory-recommended replacement of the timing belt is 60,000 miles or every four years. This important belt can often go unserviced and has the potential to fail. If the timing belt breaks, the camshafts will not turn]
What should battery voltage be on Porsche 928?
With the key in the “ON” position, you can read the battery voltage on the dash instrument cluster. A normal reading for a healthy battery should show just about 12 volts on the gauge. Anything less than 12 volts indicates the battery voltage is low, and the red light warning light on the voltage gauge will illuminate.
If all else fails in an attempt to start your 928, check for timing belt failure. The factory-recommended replacement of the timing belt is 60,000 miles or every four years. This important belt can often go unserviced and has the potential to fail. If the timing belt breaks, the camshafts will not turn]
With the key in the “ON” position, you can read the battery voltage on the dash instrument cluster. A normal reading for a healthy battery should show just about 12 volts on the gauge. Anything less than 12 volts indicates the battery voltage is low, and the red light warning light on the voltage gauge will illuminate.
How does the Porsche 928 cooling system work?
The 928 has a “right-sized” cooling system. Its just big enough to do everything it needs to so long as all the parts are in optimal condition. But, as cooling cores get partially clogged, fan shrouds get broken, and fans spin slower and slower, most 928 owners will report that their tem- perature gauge is starting to rise.
What kind of maintenance does a Porsche 928 need?
The fact that these lines were not replaced in over 20 years and were expected to work indefinitely isthe problem. Items high on the preventive maintenance list for the Porsche 928 are replacement of the fuel injection lines, power steering lines, and for automatics, the transmission fluid cooling lines.
The fact that these lines were not replaced in over 20 years and were expected to work indefinitely isthe problem. Items high on the preventive maintenance list for the Porsche 928 are replacement of the fuel injection lines, power steering lines, and for automatics, the transmission fluid cooling lines.
What are the power steering lines on a Porsche 928?
The Porsche 928 has hard lines and rubber lines for fuel injection (under pressure), transmission fluid cooling (from the transaxle in the rear, all the way up to the radiator and back) and power steering lines (not only under pressure, but the 928 uses ATF which is flammable, instead of power steering fluid).
Is the Porsche 928 a fat or slow car?
Once the 20+ year old parts have been gone over and the fuel lines, electrical systems, ignition system, suspension and drivetrain have been sorted out, the actual operating costs are no more than any other car of the same caliber. Porsche 928s are Fat and Slow. 928s are not slow at all.
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.
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.
What causes thrust bearing to fail on Porsche 928?
Thrust Bearing Failure. One of the most common issues Porsche 928 owners report is failure of the engine thrust bearing in automatic transmission equipped cars. 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,…
Can a idle stabilizer valve be replaced on a Porsche 928?
To replace the idle stabilizer valve, the intake manifold must be removed. Figure 6. Idle stabilizer valve. Early 928’s with CIS injection systems use a warm-up regulator to adjust fueling depending on engine temperature.
Thrust Bearing Failure. One of the most common issues Porsche 928 owners report is failure of the engine thrust bearing in automatic transmission equipped cars. 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,…
Why does my Porsche 928 keep losing power?
This article applies to the Porsche 928 (1979-1995). The Porsche 928, with all of its electronic gadgetry and engine control devices, can experience rough running and loss of power. Many of these poor engine performance issues can often be intermittent and leave owners scratching their heads as to what the potential problem could be.
How does the fuel pump work on a Porsche 928?
Keeping on track with fuel-related issues, the 928 fuel injection systems uses a fuel pressure regulator and fuel dampeners to control fuel flow to the injectors. The regulator and dampeners have a rubber diaphragm in them, with fuel pressure on one side of this diaphragm and vacuum on the other.
When does a Porsche 928 have an idle problem?
This article applies to the Porsche 928 (1978-1995). Your Porsche 928 should have a constant, steady, low idle. It shouldn’t be rough or fluctuating. An idle problem is something you want to get checked out as soon as possible because it is certainly causing your 928 to not run at its peak. This includes lower gas mileage.
What to do with a Porsche 928 S4 GT?
Drive the car until fully warm. shut down, remove air cleaner assembly. Start engine, and use a hair dryer on high to blow hot air over the sensor for more than 5 minutes. Note any changes in idle, and rev it a few times. It should not change idle speed, and should rev easily.
An idle problem is something you want to get checked out as soon as possible because it is certainly causing your 928 to not run at its peak. This includes lower gas mileage. Read on to discover the top four reasons that can be the cause of a rough idle in the 928.