Help, no power....

[Supra chick's dad]

Ok, timing I have not checked and compression or vacuum either. I will. Dang the thing runs so smooth at idle, like a new car should. Also starts right up, not like retarded or advanced timing, or low compression. And the cam sensor wasn't moved during the engine swap. Contacts inside have correct air gap. I took the hose off at the throttle body to eliminate any possible restrictions in the air supply, no difference. I am thinking it has to be either blocked exhaust since it has weak pressure at the tailpipe or low fuel volume or just a bad ECU. It ran fine before the previous owner ran it dry. Sat for 2 years then got a used (Under 50K) motor. I drained the fuel lines and tank and put in fresh fuel too. New spark plugs also.

[cre]

Okay, first off where in CO are you?

Second, test the TPS per the instructions detailed in the TSRM: http://www.cygnusx1.net/Supra/Librar...spx?S=FI&P=101



EDIT: Oh, and I've seen 7M's idle smooth as silk even with the timing off by 15?. Mine. It's part of the beauty of an inline 6.

[supradaddy0803]

Yeah hes right I would check your timing belt and make sure everything is peachy there then next make sure your ignition timing is dead on. My 86.5 ran like that when I bought it because the guy just did the timing belt and it did the same thing it was like a tooth off and thats all it took to drive me nuts for a while. Also besides just your fuel filter check the fuel pressure regulator if it isnt letting the pressure build up then you wont have enough fuel pressure to run at anything higher than idle.

[Supra chick's dad]

Hey, thanks guys, it's good to hear all the ideas. I did work on the Supra all weekend and came up with some new stuff. I think I found the culprit. First to answer your questions, I did replace the timing belt prior to the install but I've done many in the past. I was extremely careful setting it up right and with the 7M it's as easy as they get. The timing I checked and it was dead on at 10 btdc. I was however able to generate a code by continously trying to get the motor to rev. eventually it crapped out enough to throw a 31. Hanes (cringe) says air flow or ECU. Toyota code book says air flow. Though I had cleaned a grungy MAF already, I decided to go at it again. Upon sterilizing the crap out of the honeycomb, and reinstalling the rest of the assembly, the car revved like normal. I was so freaking stoked! But now it won't idle. Go figure. I guess it's alll good though as the normal symptom for a bad MAF is poor idle. Now that I have seen the changes directly related to the MAF, I am confident the problem lies somewhere within that little black box. 360.00 for a new one seems a bit ridiculous, but neccesary none the less. I need to call around then order one. Too bad there isn't a Supra's only parts store where a guy could get a break on the huge markup. I understand when it comes to aftermarket stuff, but these things can't cost much to make. All the engineering is covered in the cost of the car originally. Whatever, I am on my way and will report after swapping the MAF out with a new one.

[Supra2NR]

Originally Posted by Supra chick's dad

Hey, thanks guys, it's good to hear all the ideas. I did work on the Supra all weekend and came up with some new stuff. I think I found the culprit. First to answer your questions, I did replace the timing belt prior to the install but I've done many in the past. I was extremely careful setting it up right and with the 7M it's as easy as they get. The timing I checked and it was dead on at 10 btdc. I was however able to generate a code by continously trying to get the motor to rev. eventually it crapped out enough to throw a 31. Hanes (cringe) says air flow or ECU. Toyota code book says air flow. Though I had cleaned a grungy MAF already, I decided to go at it again. Upon sterilizing the crap out of the honeycomb, and reinstalling the rest of the assembly, the car revved like normal. I was so freaking stoked! But now it won't idle. Go figure. I guess it's alll good though as the normal symptom for a bad MAF is poor idle. Now that I have seen the changes directly related to the MAF, I am confident the problem lies somewhere within that little black box. 360.00 for a new one seems a bit ridiculous, but neccesary none the less. I need to call around then order one. Too bad there isn't a Supra's only parts store where a guy could get a break on the huge markup. I understand when it comes to aftermarket stuff, but these things can't cost much to make. All the engineering is covered in the cost of the car originally. Whatever, I am on my way and will report after swapping the MAF out with a new one.

if you want,
kurt from elmhurst toyota gives discount to supra owners here in IL
i can pm u his info, if u wanna order it from him

[Supra chick's dad]

Sure, anyhting will help. Thanks!

[Supra2NR]

Originally Posted by Supra chick's dad

Sure, anyhting will help. Thanks!

Curt


630.279.2265 parts direct
630.835.0122 parts fax

eparts@elmhursttoyota.com

My weekly hours are 4:30am-4:30pm M-F CENTRAL STANDARD TIME

there you go, they stock odd parts even for mk3s
and last time i needed sumthing he gave me a pretty good discount
jus be sure to ask for him, and mention supraforums.com

[88Tsupra]

hey try suprasport.com or driftmotion.com or suprastore.com they all work on supras only maybe you can find a deal on one of those..and are you running the lexus afm

[supramacist]

I still dig horsepowerfreaks.com

[Supra chick's dad]

Thanks on the parts leads. Lexas AFM??? Probably not. This Supra is all stock except exhaust mods. Should I ??? I have a lot to learn on these, I'm old school Chevy guy...