Hard start, messed up
#1
Hard start, messed up
This thing is driving me nuts. It started 2 weeks ago after driving it in the rain, then it sat for 2 days. It was hard to start and then backfired on me, then was fine. Once it dried up it ran fine for a week.
Then same thing, drive in the rain, sit for 2 days and hard to start again.
Then it started doing it all the time. At first after starting it would cough and sputter at about 200 RPM for 5 seconds then die, then start up fine.
But it was running pig rich and fouling plugs.
After 5 mins of idling, the long-term fuel trims were already at 108, so the PCM knows its running rich and trying to compensate.
Now when I try to start it, it tries to idle but its actually coughing back out the intake.
-Compression is 200 across the board.
-Fuel pressure is good and doesn't leak down. Also checked the injectors and FPR for leakage and nothing.
-All sensors scanned are reading within limits.
-Had opti off and it looks mint, not a hint of moisture or rust inside. Cap and rotor were a little worn but cleaned right up and didn't change a thing.
-Unhooked MAF and nothing changed.
-Plugs did nothing, wires all look in good shape, only 2 years old.
Its a 97, bolt on car, stock injectors.
Anybody have any ideas, it is greatly appreciated!
Then same thing, drive in the rain, sit for 2 days and hard to start again.
Then it started doing it all the time. At first after starting it would cough and sputter at about 200 RPM for 5 seconds then die, then start up fine.
But it was running pig rich and fouling plugs.
After 5 mins of idling, the long-term fuel trims were already at 108, so the PCM knows its running rich and trying to compensate.
Now when I try to start it, it tries to idle but its actually coughing back out the intake.
-Compression is 200 across the board.
-Fuel pressure is good and doesn't leak down. Also checked the injectors and FPR for leakage and nothing.
-All sensors scanned are reading within limits.
-Had opti off and it looks mint, not a hint of moisture or rust inside. Cap and rotor were a little worn but cleaned right up and didn't change a thing.
-Unhooked MAF and nothing changed.
-Plugs did nothing, wires all look in good shape, only 2 years old.
Its a 97, bolt on car, stock injectors.
Anybody have any ideas, it is greatly appreciated!
#8
Re: Hard start, messed up
I'll venture a guess to say ignition related and probably a global issue. By that I mean not individual plugs or wire but rather something that effects all the plugs such as coil wire, coil or ICM.
check the spark quality at a few random easily accessable plugs. If it's not what it should be, try a new coil and coil wire. Wouldn't hurt to look at the coil and wire at night while it's running either.
check the spark quality at a few random easily accessable plugs. If it's not what it should be, try a new coil and coil wire. Wouldn't hurt to look at the coil and wire at night while it's running either.
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