Camaro 1986, 2,8 problem with engine
#1
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: I try test fuel presure and seems ok. video: (its quite loud, I remove catalytic converter)
Any idea where is problem? Thank you for reply and sorry for my english
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
#2
Supreme Member
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.
#3
Supreme Member
iTrader: (1)
Re: Camaro 1986, 2,8 problem with engine
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
Last edited by OrangeBird; 07-21-2018 at 10:46 AM. Reason: To add wiring diagram .
#4
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 Before star(after keys move to ON position) is heard creak sound(same if I turn off the engine).. what can it be? fuel regulator? Stepper motor is silent and sound comes out of that place somewhere.
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
#5
Supreme Member
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.
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.
#6
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.
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.
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