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car acting weird, help

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Old Jan 13, 2008 | 01:05 AM
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Default car acting weird, help
Well i just got my smaller pulley in my p1 and it hit 16 psi and 6200.. i have a walbro 255 and 60lb siemen injectors. Everything is tuned. Now i did a run and its awesome. Plugs are gapped to .30, everythings fine. I decided to give my friend a ride and at 5200, it starts to shake. Kind of like a fuel cut. Now that is my first problem. 2nd is, cruising at 1500 rpms, the car shakes. When i give it gas to go, its fine. Only when barely touching the gas to cruise, it shakes. It never did that before. I dont know whats up. Lose plug or wire? I jsut had my mechanic install Autolites 103, much colder plugs. Im sure he didnt mess up on the plugs or wires so i dont know what it can be. Any input?
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Old Jan 13, 2008 | 01:23 AM
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also check fuel filter.
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Old Jan 13, 2008 | 01:27 AM
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Originally Posted by razorclaw99
Well i just got my smaller pulley in my p1 and it hit 16 psi and 6200.. i have a walbro 255 and 60lb siemen injectors. Everything is tuned. Now i did a run and its awesome. Plugs are gapped to .30, everythings fine. I decided to give my friend a ride and at 5200, it starts to shake. Kind of like a fuel cut. Now that is my first problem. 2nd is, cruising at 1500 rpms, the car shakes. When i give it gas to go, its fine. Only when barely touching the gas to cruise, it shakes. It never did that before. I dont know whats up. Lose plug or wire? I jsut had my mechanic install Autolites 103, much colder plugs. Im sure he didnt mess up on the plugs or wires so i dont know what it can be. Any input?

Is it tuned speed density? The low rpm stumble/shake you are discribing could be a bad o2 sensor, but if the car is tuned speed density then it is probably a miss. Could be a injector, plug, wire, ect, ect.
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Old Jan 13, 2008 | 01:31 AM
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ARGH! more problems
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Old Jan 13, 2008 | 01:35 AM
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Take the easy steps first.
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Old Jan 13, 2008 | 03:29 AM
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If the plugs are too cold they can foul up and act like that, and I do like to check the most recent changes first, but after that, +1 for what js2fst said...

Jim
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Old Jan 13, 2008 | 09:43 AM
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well my tuner turned my check engine light off and its back on so im gonna assume theres another code. So ill go check that out first.
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Old Jan 14, 2008 | 03:27 PM
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bad o2
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Old Jan 14, 2008 | 03:28 PM
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Originally Posted by black98ws6ta
Is it tuned speed density? The low rpm stumble/shake you are discribing could be a bad o2 sensor, but if the car is tuned speed density then it is probably a miss. Could be a injector, plug, wire, ect, ect.

Damn im good.
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Old Jan 14, 2008 | 03:35 PM
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yes you are, thanks
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