Does is broke or burn off something?

 

You can fry something in the ECM... I don't know exactly what, though. Whatever it is, you need another ECM to fix it. I think it's something that happens 1 out of 2 occurances, but that's a pretty high risk, in my opinion...



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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

I might be a little off the subject, but I was wondering if the Chilton's manual I read is correct (for 88-90 F-bodies), because it says if you have the engine on and running, and you ground A & B, the EST is disabled and you can check the timing.

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Stock 2.8 MPFI auto w/ Flowmaster 80 Series, More to come......
New Pioneer Head Unit
Targa E-910 7-Band Equalizer w/ crossover
2x 10" Pioneer subs powered by 300 Watt Jensen amp
2- 6x9" Pioneer (rear)
More to come..... (hey, i dont got a job yet)

 

Ah-Ha! No wonder I couldn't find an EST bypass connector to set timing on that '89 Camaro I worked on... ya know, the one we did the 2.8/2.8 swap on. Altho Kevin S has an EST connector... hm.

Yeah supposedly you can have the jumper in with the engine off, and have the jumper in with the engine running, but you can't start the engine with the jumper in place.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

I started my engine with them connected it started but it didnt seem right my light was blinking SES i don remeber what else happened it was 2 years ago

 

I did this by mistake the other day. When I started my car with ports A&B connected the SES light did a continous blinking thing, so I shut my car off in a hurry, and there appears to be no damage.

 

But I also have an EST connector, hmm weird.

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Stock 2.8 MPFI auto w/ Flowmaster 80 Series, More to come......
New Pioneer Head Unit
Targa E-910 7-Band Equalizer w/ crossover
2x 10" Pioneer subs powered by 300 Watt Jensen amp
2- 6x9" Pioneer (rear)
More to come..... (hey, i dont got a job yet)

 

Hehe, yeah my dumba$$ started my car once while A & B where jumped.....it wasn't pretty. My engine made some nasty sound and it was idleing VERY irratically. I shut it off QUICK....no (obvious?) damage done. Guess i got lucky.

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-Dan
-1990 3.1L RS
-Mods? no
-Slow? yes

 

Iv done it to my friends car about 20 times, once when we had lots of probs with it, never once did anything.

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

i read somewhere that if you have them connected with the engine running, the way the SES light is flashing will tell you if you are running in open or closed loop mode.

 

Yep, it's the speed of the flash... I think a fast flash is open loop, and a slow flash is closed loop?

89V6, his Camaro had a butchered wiring job done to it; I never got around to tracing wires (before the car got junked!), but I finally decided the previous owner had eliminated the connector for a piece of wire, and tucked it away in the harness somewhere. Where was your EST bypass connector? Was it right above the heater/evaporator box on the firewall? We looked all around there and didn't find any black/tan wire at all!


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!