Welcome Visitor! Please take a few seconds and 
- Joined
- Jun 13, 2016
- Messages
- 134
- Reaction score
- 40
- Points
- 28
- Location
- Connecticut
- Vehicle Year
- 1989
- Make / Model
- Bronco ii
- Engine Type
- 2.9 V6
- Engine Size
- 2.9L
- Transmission
- Manual
- 2WD / 4WD
- 4WD
- Total Lift
- 6
another week and another post on the forum, buckle up here we go.
Alright since my last post I got the truck running and "timed" 10 degrees adv "spout unplugged", and frankly it runs like s**t. plugged spout back in, truck off, restarted it. crossed fingers etc etc.
I checked for vacuum leaks, possibly loose injectors or anything else that could possibly be letting too much air in the engine, with no luck. It starts and run but runs too high "1000-1800 rpm" and runs rough. It will idle down after a minute or so and surge up and down and start to knock when the revs get real low "under 500". I'm at my wits end here, I just rebuilt this engine and it has become my worst decision of 2019 to date. I would like to just get another used engine and transplant it but in CT there aren't many b2s or rangers around. so here's my questions, the truck seems to run steady until it hiccups and I can hear the timing advance try to compensate which causes the surging, could this be a bad ECM? I faulty sensor of some sort? the truck spit the codes 10 18 77 and 21 at me.
18. loss of tach signal/IDM circuit failure or SPOUT circuit grounded. (this one bothers me)
77. operator error during wide open throttle response (I didn't touch the gas pedal while testing)
21. coolant temp sensor out of range (I unplugged wire)
10. system ok or codes will repeat I think
the 18 code has me duped, I know the spout connector works, if unplugged while running the engine idles down to 10 advance and runs like a steaming pile of..well
My research brought back possible issues with the connector on the ign coil or a ground somewhere. My theory was that possibly the rough running and intermittent misfires could be due to a coil wiring issue (coil is brand new) having trouble being consistent OORRR it could be the spout circuit coming and going causing the truck to drop down to 10 adv when it shouldn't with the connector plugged in. when I move the truck in and out of my shop it sounds very rough and like its misfiring rapidly under load. ive asked before but could someone link me to the proper steps to set a distributer after it has been removed and engine has been turned over? (my last thought is that I still have the timed messed up somehow).
thoughts, theories, advice, links to good mental help specialists all welcome
Alright since my last post I got the truck running and "timed" 10 degrees adv "spout unplugged", and frankly it runs like s**t. plugged spout back in, truck off, restarted it. crossed fingers etc etc.
I checked for vacuum leaks, possibly loose injectors or anything else that could possibly be letting too much air in the engine, with no luck. It starts and run but runs too high "1000-1800 rpm" and runs rough. It will idle down after a minute or so and surge up and down and start to knock when the revs get real low "under 500". I'm at my wits end here, I just rebuilt this engine and it has become my worst decision of 2019 to date. I would like to just get another used engine and transplant it but in CT there aren't many b2s or rangers around. so here's my questions, the truck seems to run steady until it hiccups and I can hear the timing advance try to compensate which causes the surging, could this be a bad ECM? I faulty sensor of some sort? the truck spit the codes 10 18 77 and 21 at me.
18. loss of tach signal/IDM circuit failure or SPOUT circuit grounded. (this one bothers me)
77. operator error during wide open throttle response (I didn't touch the gas pedal while testing)
21. coolant temp sensor out of range (I unplugged wire)
10. system ok or codes will repeat I think
the 18 code has me duped, I know the spout connector works, if unplugged while running the engine idles down to 10 advance and runs like a steaming pile of..well
My research brought back possible issues with the connector on the ign coil or a ground somewhere. My theory was that possibly the rough running and intermittent misfires could be due to a coil wiring issue (coil is brand new) having trouble being consistent OORRR it could be the spout circuit coming and going causing the truck to drop down to 10 adv when it shouldn't with the connector plugged in. when I move the truck in and out of my shop it sounds very rough and like its misfiring rapidly under load. ive asked before but could someone link me to the proper steps to set a distributer after it has been removed and engine has been turned over? (my last thought is that I still have the timed messed up somehow).
thoughts, theories, advice, links to good mental help specialists all welcome
