1999 cavalier fuel pressure - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-26-2011, 07:53 PM   #11
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Got a set of Noids and checked the fuel injectors. They all had signal (flashed) while engine cranked. I checked spark at plugs again & this time they were weak (yellow spark) not blue & strong. I did a compression test & the numbers are low - 60psi but my battery is weak & the engine is cold so not sure if this test is reliable. I'm thinking it'* ignition related but I'm lost at the moment. Any ideas?
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Old 03-26-2011, 08:03 PM   #12
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Have you tested the coils?
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Old 03-26-2011, 08:07 PM   #13
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not yet. I thought I had good spark initially so I didn't check. I'll check tomorrow.
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Old 03-26-2011, 09:02 PM   #14
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Can crankshaft position sensor cause no start? Going to get a scan tool to see if there are any codes.
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Old 03-26-2011, 09:29 PM   #15
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Yes it can. It'* a hard sensor to test with out the proper tools.
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Old 03-27-2011, 09:46 PM   #16
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Checked the coils & they are OK. Checked connections again. Put 3 gallons of gas in just to be sure it wasn't out. Hate to say it but--I give up. Going to have it towed to a shop.
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Old 03-27-2011, 09:54 PM   #17
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Let us know what they find.
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Old 03-31-2011, 07:36 PM   #18
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update: Shop checked fuel, injectors, ignition & found no problems. Checked compression: 30-0-75-85psi. Not good. Need engine rebuild or another engine.If i get a used engine, will I need to get the pcm also? Anything else?
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Old 03-31-2011, 10:36 PM   #19
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Quote:
Originally Posted by 97BONNIESE View Post
update: Shop checked fuel, injectors, ignition & found no problems. Checked compression: 30-0-75-85psi. Not good. Need engine rebuild or another engine.If i get a used engine, will I need to get the pcm also? Anything else?
As a general rule of thumb, yes.

You can more than likely keep your existing computer if and only if the donor car is both from the same year, make, and model; and has an identical engine.
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Old 04-01-2011, 07:02 PM   #20
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Talked to mechanic that will swap engine for $800 including engine from '99 cav with 96k. Hope to confirm tomorrow.
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