97 Sl2 Mis-fire Under Load

Nov 30, 2006 6 Replies
F

I have a 97 sl2 with 127k on it and under a load it mis-fire i chec



fuel pressure it's 36-42 from idle and when brake torqued. I als replace wires ,fuel filter and pcv . my next guess is fuel injector because i think it's fuel related because all coil pack are firing ok also has engine lite on for egr and cat-converter. i replace egr wit two use ones with no difference


-- fort



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S

Have you tried a OBD2 port code scan???

----------------- TheSnoMan.com

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B

Operating Pressure should be 40-55 psi.

Wires should be below 12,000 ohms. Are they?

What plugs did you use?

Do you have egr and converter codes?

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P

Had the same issue. went the same route with troubleshooting. Turned out is was a broken intake manifold gasket.

Paul

forty wrote:

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L

Doh! Before your guessing costs you even more money and still doesn't fix the problem, please consider either having the codes read and/or getting a diagnostic performed at your local Saturn dealer. If it saves you from having to replace ONE part that you don't need to, it has paid for itself.

Lane [ lane (at) evilplastic.com ]

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D

Have you checked #1 spark plug?

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