SamirDarji
06-08-2006, 10:10 AM
I searched endlessly for some other threads on this, but didn't come up with anything really good. https://www.thegalantcenter.org/style_emoticons/default/sad.gif
Well, I was just driving down the road coming back from a VW club meeting the other night and I felt a wobbling on my left front while taking an exit ramp. I thought it might have been a tire, so I slowed down and stopped on a road I know really well.
Found the engine shaking pretty bad and the idle really wierd. Checked the exhaust and found the engine putting in bursts like it was no longer doing multi-port injection and was on some sort of limp home mode program.
Pulled the spark plugs the next day and found #1 to be fouled out. All others good. Swapped #1 and #3 plugs to see if I could recover #1's plug and see if #1 will fire with a good plug. Still nothing. Checked for spark on #1's wire and it was good. Got a brand new plug for #1 and put #3's back where it was. Still nothing.
Last night, my buddy who is the lead Porsche tech here in town (and also Ferrari, Aston Martin, Maserati, GM, and Toyota certified and a ASE Master Tech) brought a obd2 scanner and his tools. The OBD indicated 3 codes--IAC, a rear o2 and cyl #1 misfire.
We changed all the spark plug hole gaskets and changed the plug wires to Magnacor. Still nothing. We're getting spark from the wire and fuel so it's puzzling. He's not run across something like this before. I'm going to head over to his work during lunch and he's going to do a quick compression test and see what we can come up with.
So what do you think? Compression? Distributor? O2 sensor? I know the distributor is the stock one on the car since I bought it with 92k (has 156k now). There is oil leaking into it from the o-ring seal (which I have, but haven't replaced yet). So this could be it, but then why would we be getting spark?
According to the FSM, the following items are suspect:[LIST]ignition coil
Ignition power transistor
Spark Plug
Ignition circuit
Injector
O2 sensor
Compression pressure
Timing belt
Crankshaft position sensor
Air intake
Fuel pressure
Crankshaft position sensor circuit and connector[LIST]I think we've eliminated the Spark plug, wires, injector, timing belt (since nothing else is off), crankshaft position sensor (no code), air intake, fuel pressure, and crankshaft position sensor circuit. That leaves compression, ignition stuff and o2 sensor.
So what do you think? Especially if you've had any personal experiences with this. Any assistance appreciated.
Well, I was just driving down the road coming back from a VW club meeting the other night and I felt a wobbling on my left front while taking an exit ramp. I thought it might have been a tire, so I slowed down and stopped on a road I know really well.
Found the engine shaking pretty bad and the idle really wierd. Checked the exhaust and found the engine putting in bursts like it was no longer doing multi-port injection and was on some sort of limp home mode program.
Pulled the spark plugs the next day and found #1 to be fouled out. All others good. Swapped #1 and #3 plugs to see if I could recover #1's plug and see if #1 will fire with a good plug. Still nothing. Checked for spark on #1's wire and it was good. Got a brand new plug for #1 and put #3's back where it was. Still nothing.
Last night, my buddy who is the lead Porsche tech here in town (and also Ferrari, Aston Martin, Maserati, GM, and Toyota certified and a ASE Master Tech) brought a obd2 scanner and his tools. The OBD indicated 3 codes--IAC, a rear o2 and cyl #1 misfire.
We changed all the spark plug hole gaskets and changed the plug wires to Magnacor. Still nothing. We're getting spark from the wire and fuel so it's puzzling. He's not run across something like this before. I'm going to head over to his work during lunch and he's going to do a quick compression test and see what we can come up with.
So what do you think? Compression? Distributor? O2 sensor? I know the distributor is the stock one on the car since I bought it with 92k (has 156k now). There is oil leaking into it from the o-ring seal (which I have, but haven't replaced yet). So this could be it, but then why would we be getting spark?
According to the FSM, the following items are suspect:[LIST]ignition coil
Ignition power transistor
Spark Plug
Ignition circuit
Injector
O2 sensor
Compression pressure
Timing belt
Crankshaft position sensor
Air intake
Fuel pressure
Crankshaft position sensor circuit and connector[LIST]I think we've eliminated the Spark plug, wires, injector, timing belt (since nothing else is off), crankshaft position sensor (no code), air intake, fuel pressure, and crankshaft position sensor circuit. That leaves compression, ignition stuff and o2 sensor.
So what do you think? Especially if you've had any personal experiences with this. Any assistance appreciated.