Help Please: Engine Dies at Stop
12-10-2008, 11:43 PM
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Help Please: Engine Dies at Stop
Hi Guys
I've done a lot of searching and read lots of posts that seem relevent to the symptos I'm getting. That said I thought I would post my whole story here and see if anyone could help me narrow down to what the issue could be.
THE CAR:
- 2004 MT (56,000 km)
- Recently added a CAI
- Everything else is stock
THE ISSUE:
- Car idles a little rough.
- When drop the clutch in the RPM fall in a non-smooth manner and will overshoot and fall too low
- THe above problem gets worse when rolling up to a stop sign and breaking in neutral (it has even died, but can be started again right away)
THE BACKGROUND:
I recently had installed an aftermarket intake. I tested it out and everything ran fine, though the car was idling slightly lower than before (800 instead of 950ish). I drove around normally and aggressivly for 100KM no problems. I parked and came back latter and started the car, then reved it a bit and it threw a CEL. I did a reset (via the battery disconnect method) and cleared the CEL.
Since the battery disconnect I've had issues. The idle is now rough and doesn't sit it fluctates +\- 50 RPM. When I rev the engine in neutral and let it fall the rpm fall isn't smooth and falls below idle and pops back up, hunting for idle.
I thought the issue was the by clearing the ECM it lost some of it's learned parameters so I figured I need to drive around a bit. I drove around the block a few times and found as I costed up to stop signs and braked the RPM dropped quickly and even lower. Eventually it died. I was able to start it again and drive home. (It did die again in the parking garage).
I turned the car off and turned it back on and it idled rough and the behaviour was same as it's been since the reset.
Note: the engine temperature seemed normal but to be honest I didn't pay too close attention to it. And I currently have no CEL or any other warning lights.
WHAT I HAVE READ
- Could be a Vacume Leak (How do I find it?)
- Could be some nasty oil build at the Throttle Body (though I didn't see any when I installed the intake and it's only been driven 200Km since then)
- Fouled plugs\Bad Coils
- Something with the MAF plug maybe???
Any ideas? Any help would be greatly appreciated
I've done a lot of searching and read lots of posts that seem relevent to the symptos I'm getting. That said I thought I would post my whole story here and see if anyone could help me narrow down to what the issue could be.
THE CAR:
- 2004 MT (56,000 km)
- Recently added a CAI
- Everything else is stock
THE ISSUE:
- Car idles a little rough.
- When drop the clutch in the RPM fall in a non-smooth manner and will overshoot and fall too low
- THe above problem gets worse when rolling up to a stop sign and breaking in neutral (it has even died, but can be started again right away)
THE BACKGROUND:
I recently had installed an aftermarket intake. I tested it out and everything ran fine, though the car was idling slightly lower than before (800 instead of 950ish). I drove around normally and aggressivly for 100KM no problems. I parked and came back latter and started the car, then reved it a bit and it threw a CEL. I did a reset (via the battery disconnect method) and cleared the CEL.
Since the battery disconnect I've had issues. The idle is now rough and doesn't sit it fluctates +\- 50 RPM. When I rev the engine in neutral and let it fall the rpm fall isn't smooth and falls below idle and pops back up, hunting for idle.
I thought the issue was the by clearing the ECM it lost some of it's learned parameters so I figured I need to drive around a bit. I drove around the block a few times and found as I costed up to stop signs and braked the RPM dropped quickly and even lower. Eventually it died. I was able to start it again and drive home. (It did die again in the parking garage).
I turned the car off and turned it back on and it idled rough and the behaviour was same as it's been since the reset.
Note: the engine temperature seemed normal but to be honest I didn't pay too close attention to it. And I currently have no CEL or any other warning lights.
WHAT I HAVE READ
- Could be a Vacume Leak (How do I find it?)
- Could be some nasty oil build at the Throttle Body (though I didn't see any when I installed the intake and it's only been driven 200Km since then)
- Fouled plugs\Bad Coils
- Something with the MAF plug maybe???
Any ideas? Any help would be greatly appreciated
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