Camaro 1986, 2,8 problem with engine Hi guys from heart of europe:) I have camaro 1986, 2.8 multiport FI. I could start but no power and no speed if I stepp on the gas pedal. I replace: sparg plugs (ngk 2771) Ignition control module (ACDelco D1943A) pickup coil ignition coil (UNITED MOTOR PRODUCTS C535) Catalytic converter is ok (replaced some years ago) . and no change Diagnostic say only 34-MAF (but this sensor is bad some years and car was run good) Engine running video: Any idea where is problem? Thank you for reply and sorry for my english:) |
Re: Camaro 1986, 2,8 problem with engine Do you have access to a scan tool? And can you do a backpressure test? If youre flooring it and RPMs do not rise like they used to then something could be plugged. Also youre english is good. |
Re: Camaro 1986, 2,8 problem with engine 1 Attachment(s)
Originally Posted by judzinisko
(Post 6237517)
........Diagnostic say only 34-MAF (but this sensor is bad some years and car was run good)........ There are various levels of MAF failure , as in perhaps when the first code 34 appeared some years ago the MAF voltage output was slightly low , enough to trigger the code but not low enough to affect the running of the engine . Now , some years later maybe the MAF has finally totally failed , no output whatsoever , and this very well could cause the issue your now experiencing . The new MAF may well or may well not solve your problem , but like I said earlier , before blindly throwing one more random part at the car , fix what you KNOW is broken first , and then if the problem persists then take the troubleshooting from there . If a new MAF doesn't fix it , as a next step put a "noid light" on both injector banks (after checking the fuses INJ 1 and INJ 2) , to make sure all 6 of your injectors are actually spraying fuel into the engine . PS , Before you DO replace the MAF , using this handy wiring diagram for your engine make sure you do have +12V on the light blue wire coming from the MAF relay :thumbsup: |
Re: Camaro 1986, 2,8 problem with engine Pro: No, I have no scan tool, what you mean exactly? Is some better for my old camaro, than MIL(service engine light and plug wire between A and B pin on the diagnostic conector)? :) Same with "backpressure test".. but I try use google for more info:) OrangeBird: I understand you, but real sittuation is: MAF was totaly dead some years ago(interupted wire on PCB - no signal to ECU ) and camaro was run in safe mode good. The problem is new. All fuses are ok, but I try check the injectors. Today I noticed on the back side of throttle it too much carbon with oil or fuel(carbon is not dry but greasy). Same in manifod intake - I try disassemble it and cean. If I start engine and unplug conector from TPS sensor, RPM will increase 2x or 3x (i dont know exactly, i have no tachometr) and engine run pretty good (on this RPM) I make video with cold start.. Is here |
Re: Camaro 1986, 2,8 problem with engine It sounds like you just have a code reader. You need a scanner with an ALDL cable. You can get one complete unit like this: http://www.1320electronics.com/products.html And then sync it up with your phone/tablet. Start up the car and check out your fuel trims, O2 sensor readings, etc. Or you can get an ALDL cable from moates.net, tunerpro rt (free), and a laptop and do the same. But the first link I posted would get you started quicker. |
Re: Camaro 1986, 2,8 problem with engine Thanks, I look at it. Is some chance that the software will be work with this scaner+reduction cable?: scaner elm327: https://www.aliexpress.com/item/ELM3...ceBeautifyAB=0 reduction ALDL-OBD2: https://www.ebay.de/itm/Diagnosegera...QAAOSwdzla~oYP I buy elm327 one year ago for my ford. Reduction I can buy from a neighboring country.. It will be about 2 weeks faster. |
Re: Camaro 1986, 2,8 problem with engine Problem solved. Bad throttle possition sensor. |
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