What are the relays on a Porsche 944?
The relay on the later 994s actually has two relays within it, one that powers the DME and KLR on the 951 and a separate relay that powers the fuel pump and heater for the O2 sensor.
Is the de icing switch on my Porsche 944 defective?
Voltage at only one connector–system has low pressure or switch is defective. Now at this point the manual starts talking about term.3 and term.2, but on my relay, we only have terminals 30,31,85,86,87a. Check de-icing switch.
What to do if your Porsche 944 has a leak?
Open valves and run vacuum pump for 30 minutes, to boil off all moisture. Close valves and make sure vacuum is held. If not, there is a leak. This is a good time to add oil, if needed. Pour some in the hose, the R134 will push it into the system. Open high-side (red) valve. This will let some of the R134 go into the system.
How to troubleshoot a Porsche 944 air conditioner?
At the beginning of the troubleshooting instructions Porsche should specify “if nothing on your climate control unit works (except for the fan) then that just might be the problem, dude.’ If Porsche had specified that it would have save me a lot of trouble dicking around with my gauge set and voltmeter.
When to replace a blown fuse on a Porsche 944?
If you need to replace a blown fuse in your 944, make sure you replace it with one that has the same amperage as the blown fuse. If checking and replacing the fuse for the component in question doesn’t work, we recommend seeking assistance from a trusted professional mechanic.
Where is the fuel pump relay located on a Porsche 944?
On the older 944s, the relay is known as the fuel pump relay and is located on the fuse panel under the dash on the driver side. On later 944s and 951s, the relay is located in the fuse /relay panel in the rear left side of the engine compartment close to the windshield and A-pillar. These relays are prone to failure, a lot of failures.
Is the DME relay on a Porsche 944 good?
If you are going to drive a 944 or 951, invest in a couple of extra DME relays and always carry a spare. There is even room in the fuse box for the spare. With a proper functioning relay, buy a spare and swap it out with the good relay. If the car starts and runs with no problems, then you know the new relay is good.
Voltage at only one connector–system has low pressure or switch is defective. Now at this point the manual starts talking about term.3 and term.2, but on my relay, we only have terminals 30,31,85,86,87a. Check de-icing switch.
What are examples of electrical problems in Porsche 911?
Example: a dashboard light goes on when you hit the brake, but only when the rear defogger is on, or the radio only works when you are in reverse. As bizarre as it sounds, electrical problems like these are very common on these older cars, and unfortunately, they can be quite difficult to fix.
What to do if your Porsche 911 Fuse has blown?
If the relay checks out, then you want to make sure that the fuse is still good. Identify the proper fuse, and check to make sure that it has not blown. Also, the long tubular fuses that the 911 uses are susceptible to corrosion building up on the terminals. Make sure that the fuses are clean and securely seated.
How much does it cost to troubleshoot a Porsche 911?
You’re left holding the mess, armed with only a few sporadic clues as to what is causing the problem. Troubleshooting electrical problems is a tough chore, and one that most automotive repair shops will not perform without telling you they will charge you their $80 an hour diagnostic fee.
The relay on the later 994s actually has two relays within it, one that powers the DME and KLR on the 951 and a separate relay that powers the fuel pump and heater for the O2 sensor.
When did the Porsche 944 Turbo come out?
1982 944 introduced, replacing 924 turbo 1983 Optional power steering, electric sunroof, 16in alloys, ‘sport pack’ suspension 1985 944 turbo launched (220bhp, 0-60mph in 5.9 secs, 158mph); many detail upgrades to 944
What should I look for in a Porsche 944?
A worn or stiff gear linkage is common: upgrades using much more durable 968 bushes are available. The front suspension wears, which means replacing the entire lower arm; lowered suspension and wide wheels can lead to cracked arms with dangerous consequences.
When to replace balancer shaft on Porsche 944?
Replacing cam drive and balancer-shaft drive belts at 48,000 miles or four years is vital to avoid a blown engine; the water pump should also be checked and replaced if in doubt. On the twin-cam S/S2, replace the hydraulic tensioner and the (mid-head) chain that takes drive from the exhaust to inlet cam at least every 96k miles.