Occasional black smoke running rich

gelwell · 04-08-2008, 06:11 PM

I have been experiencing a problem I was hoping the board could help me with. On occasion the check engine lite will come on and the engine will load up and have to accerlerate the to get it out. I have replaced the turbo since I was told that would be the problem. But I have plenty of boost. Any suggestions of what it could be?

mkiiisupra · 04-08-2008, 06:31 PM

First read the FAQ section:
Supra FAQ - Toyota Supra Forums

Then never trust another mechanic you will always waste your money, unless you happen to get lucky and find someone with mkiii experience.

And then do a self diagnostic and let your car tell you whats wrong.
http://www.toyota-supra.info/forums/...iagnostic.html

mkiiisupra · 04-08-2008, 06:38 PM

on a side note a mechanic once told me too that my turbos wastegate was stuck open.... And i needed a new turbo, so i pulled it off and sent it in for a rebuild + upgrade... while i was inspecting the turbo i pulled off i came to realize it was in perfect working condition wastegate was fine/ little to no shaft play....

Spent 700 bucks on a rebuild for no reason, at least i decided to upgrade the turbine wheel so it wasnt a compelte waste....

Then i started to research and read. Swore id never pay another mechanic again lol

had to recently thought i was outa freon AC wouldnt work.... 168 dollars later the mechanic plugd in one wire.... Should of fixed myself i just assumed it was the freon ;(.... That was a mistake lol

Anyways after taking it to toyota.... and several shops... having toyota tell me they had no idea how to fix there car ( yes after flipping the bill on several things that where not the problem) And other places telling me i needed a new turbo....

You know what the problem was? a 30$ fix.. my knock sensor wiring was bad... that was it.... So thanks to this forum and other sources i was able (no i am not a mechanic or a electrician) to wire it up and Supra runs perfect....

You know who told me what was wrong with my car? She did. +1 to toyota for making a vehicle w/ a way to self diagnois w/o extra electronics.

gelwell · 04-09-2008, 06:35 PM

knock sensor wire huh? Was your car running rich too?

04-08-2008, 06:11 PM	#1
gelwell Stock Join Date: Mar 2007 Location: San Diego Posts: 18	Occasional black smoke running rich I have been experiencing a problem I was hoping the board could help me with. On occasion the check engine lite will come on and the engine will load up and have to accerlerate the to get it out. I have replaced the turbo since I was told that would be the problem. But I have plenty of boost. Any suggestions of what it could be? __________________ '88 Supra Red, 7mgte motor, auto trans- I know manual is better for this car. Sport top.

04-08-2008, 06:31 PM	#2
mkiiisupra Lexus & 550's Join Date: Sep 2007 Location: Las Vegas, NV Posts: 570 Blog Entries: 1	First read the FAQ section: Supra FAQ - Toyota Supra Forums Then never trust another mechanic you will always waste your money, unless you happen to get lucky and find someone with mkiii experience. And then do a self diagnostic and let your car tell you whats wrong. http://www.toyota-supra.info/forums/...iagnostic.html __________________ 1990 Toyota Supra Turbo A/T ------------------------------------------------ Questions about oil? take a look http://www.supramania.com/aehaas/

04-08-2008, 06:38 PM	#3
mkiiisupra Lexus & 550's Join Date: Sep 2007 Location: Las Vegas, NV Posts: 570 Blog Entries: 1	on a side note a mechanic once told me too that my turbos wastegate was stuck open.... And i needed a new turbo, so i pulled it off and sent it in for a rebuild + upgrade... while i was inspecting the turbo i pulled off i came to realize it was in perfect working condition wastegate was fine/ little to no shaft play.... Spent 700 bucks on a rebuild for no reason, at least i decided to upgrade the turbine wheel so it wasnt a compelte waste.... Then i started to research and read. Swore id never pay another mechanic again lol had to recently thought i was outa freon AC wouldnt work.... 168 dollars later the mechanic plugd in one wire.... Should of fixed myself i just assumed it was the freon ;(.... That was a mistake lol Anyways after taking it to toyota.... and several shops... having toyota tell me they had no idea how to fix there car ( yes after flipping the bill on several things that where not the problem) And other places telling me i needed a new turbo.... You know what the problem was? a 30$ fix.. my knock sensor wiring was bad... that was it.... So thanks to this forum and other sources i was able (no i am not a mechanic or a electrician) to wire it up and Supra runs perfect.... You know who told me what was wrong with my car? She did. +1 to toyota for making a vehicle w/ a way to self diagnois w/o extra electronics. __________________ 1990 Toyota Supra Turbo A/T ------------------------------------------------ Questions about oil? take a look http://www.supramania.com/aehaas/

04-09-2008, 06:35 PM	#4
gelwell Stock Join Date: Mar 2007 Location: San Diego Posts: 18	knock sensor wire huh? Was your car running rich too? __________________ '88 Supra Red, 7mgte motor, auto trans- I know manual is better for this car. Sport top.

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