Its old, its crummy, it cost alot of money. SUPRA TIME!

[SUPRASTEVE]

So, I was just about to go to work in the old supra(89 7m-gte r154) right? Well I start it up and wait about 5 minutes. I head out slowly not boosting or hammering on the gas or anything because its still warming up. I've done this alot, so i'm going down the street and the car starts like jerking. I thought the clutch finally gave out since its in need of one, however the car starts trying to shut off. It felt like boost leak. I pull over and the cars idle is low like 300rpm and the check engine light comes on. It felt like the car was going and then it would just like cut the power instantly it was very strange. Lucky for me i was a block away from my home so i turned around and the supra got me home. I parked it went and took another car to work. Came home and started workin in the rain ( yay for my apartment having a car port) and I checked the codes. It gave me a code for 31. WTF the cars engine is new the harness is new, and the AFM is good. Well, I had a spare afm and I swapped the old one out. The old afm seemed like it had alot of moisture. (another WTF moment) So I hooked it all back up and let the car warm up and checked the codes again. Still 31. So i drove it down the street normally. It was fine again WTF. So i did a couple hard pulls WOT. It ran with no problem and no check engine light. WTF! So in rest my case and can only say WTF. I have a theory that it may be my ECU only cuz the shop I took it to changed my old one out but didn't give it back to me. Thats another issue that I'm not willing to discuss.

---------- Post added at 03:05 AM ---------- Previous post was at 02:58 AM ----------

P.S. YES I'm working on getting a clutch. I already have an alluminum flywheel and bolts. Just need the clutch and throwout bearing or pilot bearing, and a few other things.

 

[RazoE]

reset your ECU to get rid of codes, since the ECU stores them..

 

[jester1341]

Ditto, also, I'm sure this goes without saying but if they arn't willing to give back YOUR parts..... They are no good.

John

 

[SUPRASTEVE]

*sigh* the car feels less powerful. I don't know.

 

[Supracentral]

Remember that the ECU in the Supra is a learned value setup. First reset the codes, then give the ECU time to learn. If you've changed anything (like the AFM) the learned values are likely incorrect at this point.

 

[SUPRASTEVE]

Thanks SC I'm going to reset the car now that I don't need it. P.S. checked the pipeing just for giggles and its all good. I got code 31 and 24 but Like you its a learned value. So I will reset. Worst comes to worst the car is crap once again, which i don't understand because its a new harness new engine and new ECU and its doin the same crap as last time. Maybe this thing is cursed LOL JK

 

[Supracentral]

31 & 24 combined is a clue. They share the same harness. I'd start by inspecting wiring for damage. Don't assume the wiring is undamaged because it is new. There may be a sharp edge on your chassis that is damaging the new harness.

 

[SUPRASTEVE]

Hmm great thats no good at all. Thanks I'll look and see however, for that part of the harness where does it go to the afm and what else or am i wrong?

 

[Supracentral]

Hmm great thats no good at all. Thanks I'll look and see however, for that part of the harness where does it go to the afm and what else or am i wrong?

Both the IAT and the AFM are plugged into it. Each traces directly back to the ECU via the harness through the firewall.

 

[winsauce]

"new" from yoda? or "new" for you, which means someones "old" and possible hot mess...

best tool for opening up harnesses, least likely tool to damage you and your expensive harness.

after you cut an entire harness apart to check the wires integrity its hard to bring yourself to re sheathing it with the oem wrap, or worse yet getting the generic ricer wrap and electrical tape bs @ autozone... i went with this and heres how it looks installed.

 

[SUPRASTEVE]

Brand new Toyota Harness.

 

[winsauce]

Brand new Toyota Harness.

dang son... what did that set you back?

 

[slow_yota]

It hurts to even think about how much it was....They want $500.00 for an oem front bumper !

 

[SUPRASTEVE]

about 800

 

[suprayo]

Its worth it for a new harness. I paid over a thousand to get my wiring extended for my JZ swap. I wasnt very happy.

 

[SUPRASTEVE]

yeah I don't have to tools or time to check the whole harness. especially back there on the fire wall. Well 5 years from now 2jz-gte swap LOL

 

[suprayo]

I wish I would have just forked out the dough and did the 2j instead of the 1j. but oh well, everythings 20 20 in hindsight

 

[SUPRASTEVE]

I wish I would have just forked out the dough and did the 2j instead of the 1j. but oh well, everythings 20 20 in hindsight

Yeah, Fricken Supras man.