Question about 1994 Chevrolet Caprice Classic
1994 Chevrolet Caprice Classic could be OBD I
Reading OBD 1 Codes on GM 1982 1995
There is no digital display for ODB I ...the check engine light will blink a series of flashes to provide a code for the fault. Check the link for the video that explains how to retrieve fault codes.
Posted on Apr 27, 2017
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Posted on Jan 02, 2017
do you get check engine codes?..have you done a leak down test and compression test to determine mechanical engine health?
Posted on Oct 07, 2008
My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.
Posted on Dec 10, 2008
SOURCE: 98 Chevy Astro van AWD
I'd check for vacuum leaks next. use a spray can of intake or brake cleaner. spray around vacuum lines, manifold gaskets etc. if the rpm increases you found a leak.
Posted on Jun 25, 2009
First thing you need to know is which cylinders are missing. Then, don't forget there is an engine beneath the electronics. Do a quick test with a vacuum gauge and do a compression test. Check the distributor shaft for side play. If everything checks out good, then do electronic component testing. have a code check run (many parts stores do this free) and get a chiltons or haynes manual and follow test procedures in there.
I refrain from giving repair suggestions with problems like yours because people keep changing instead of testing parts. When I work on my vehicles or other peoples cars, I do testing to avoid buying expensive parts that most times won't correct the problem. At this point the most I'd suggest is to clean the mass air flow sensor wires with a Q-tip and carb cleaner...that often helps and is free. If you run into a problem with whatever you find, ask and I'll try to help.
Posted on Oct 05, 2009
Testimonial: "I followed suggestions, it did helped some what."
check to see if you have a part under the distibuter, this would be an ignition control module, this part does 4 things, 2 fuel based and 2 ignition based functions, this can be reomoved and tested at more auto parts stores.
Posted on Nov 02, 2009
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