Oldsmobile When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Olds 98 1985y 3.8 black smoke no idle

Old Nov 13, 2021 | 10:46 AM
  #21  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

Originally Posted by gpow
What we found is that injectors injects fuel too late when piston is already moving down. Who is responsible for it? I
Exactly how did you determine this?
Reply
Old Nov 13, 2021 | 11:40 AM
  #22  
gpow's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Sep 2021
Posts: 20
Likes: 1
gpow is on a distinguished road
Default

Originally Posted by carfixer007
Exactly how did you determine this?
i have turned ignition on and spinned engine manually ans saw where piston is by removing spark plug and we can hear when injector clicks
Reply
Old Nov 25, 2021 | 04:09 PM
  #23  
gpow's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Sep 2021
Posts: 20
Likes: 1
gpow is on a distinguished road
Default

Hello guys!
i have checked with OBD1 when car was not started no fault codes.
i will try to start and see live data maybe you can suggest me what I can check in live data?
or anyone else has any suggestions what else to check.
as well attaching one interesting screenshot what was on scanner.
there are no MAP in this car it uses MAF



Reply
Old Nov 25, 2021 | 08:32 PM
  #24  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

Do you know how to use that tool? That was the first scan tool I used. The TPS and MAP are both out of range. Make sure they are connected correctly and inspect the wiring.
Reply
Old Nov 28, 2021 | 08:49 AM
  #25  
gpow's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Sep 2021
Posts: 20
Likes: 1
gpow is on a distinguished road
Default

Hello.

Update. I have inspected all wiring drom knock sensor, tps, iac, maf to ecu. And all communications and wiring is correct.
One thing what i have noticed is this esc module. We do get all signals from knock sensor, maf.
But if I unplug ESC module and start car it does not changes at all. Everything is same.
Attaching photo
Reply
Old Nov 28, 2021 | 08:50 AM
  #26  
gpow's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Sep 2021
Posts: 20
Likes: 1
gpow is on a distinguished road
Default

Originally Posted by gpow
Hello.

Update. I have inspected all wiring drom knock sensor, tps, iac, maf to ecu. And all communications and wiring is correct.
One thing what i have noticed is this esc module. We do get all signals from knock sensor, maf.
But if I unplug ESC module and start car it does not changes at all. Everything is same.
Attaching photo


Reply
Old Dec 2, 2021 | 03:47 AM
  #27  
gpow's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Sep 2021
Posts: 20
Likes: 1
gpow is on a distinguished road
Default

Could it be as well bad maf sensor and how to check it without live data. As car running when i unplug it nithing changes as well
Reply
Old Dec 2, 2021 | 02:53 PM
  #28  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

Does the engine stumble when tapping the sensor?
Reply
Old Dec 2, 2021 | 03:07 PM
  #29  
gpow's Avatar
Thread Starter
Junior Member
Posts like a Ricer Type-R
 
Joined: Sep 2021
Posts: 20
Likes: 1
gpow is on a distinguished road
Default

No changes at all. Could it be that it is MAF related issue? As unpluging MAF does not affect engine as well
Reply
Old Dec 2, 2021 | 05:41 PM
  #30  
carfixer007's Avatar
Senior Member


True Car Nut
 
Joined: Dec 2018
Posts: 3,239
Likes: 1,597
From: Flint, MI USA
carfixer007 is on a distinguished road
Default

If the engine ran better with it disconnected then the sensor needs replacing.
Reply

Thread Tools
Search this Thread

All times are GMT -4. The time now is 03:14 AM.