power issue

[brandon bowles]

hey i have a 89 supra and i am having a power issue HELP!!! this is what is going on. PUT IT IN 1ST GEAR AND GO WILL GET TO ABOUT 22-2400 RPM AND STUDDER/TRY TO STALL UNTILL I COME OFF THE THROTTLE TO JUST A LITTLE THROTTLE. DOSE THIS IN ALL GEARS ACTS LIKE IT STARVES OR FLOODS OUT. changed ecu still the same. now everynow and then i can get one maybe two good runs down the street then back to its problem. it has 550cc r/c 255lph walbro 60mm 3in exhaust ls400 maf. ANY THOUGHTS WHAT IT COULD BE??????

[MJG]

Is the "check engine" lite on? Which code do you have?

[brandon bowles]

it was at once change the ecu and it went away and hasnt came back. havent had took it to pull the codes yet. taking it to the shop tuesday for that. and i found out that one of my oil cooler line bolts are missing from the turbo topside.

[Travis89Turbo]

Check the codes your self go to the FAQ and its right on top. Dont pay a shop to do it. Does it cut out if ur not driving? sounds to me like fuel cut. are u running any kind of FCD? there is a guy that sells a screw that goes into the Lexus Afm that I ran in mine to adjust fuel cut. His name was reg reimer out of Canada it was a 90 dollar screw the cost is high cuz he designed and engineered it himself. ill have to do some digging to find a link whn im on my computer not my cell phone. It's been 3 yrs since I bought it but ill see what I can dig up. And are u running the 7mgte sensor on the Lexus Afm body? If ur running the Lexus sensor itself put ur supra one on the Lexus Afm body. Plugs are the same but I heard they are diff. Internally

[brandon bowles]

ok i use a bobbi pin and pulled code from car and it is 51. when you first turn the switch to acc. it just blinks real fast. then when you start the car blinks fast still. give the car some gas it acts up and then blinks the code. what could it be?not getting what it means on that page ignition switch

[Travis89Turbo]

Your knock sensors need re wired check the post knock sensor rewire.... very common problem on 7m. I did mine in about 3 hrs taken my time...again I can't post link cuz im on my cell phone still....just Google it and u will find step by step instructions.... ill post link later whn i get home if needed... oh and the knock sensor code doesn't store in your ecu it only comes on after your car has been running a minute.. I used my old plugs too I didn't buy new one BTW

[Travis89Turbo]

I just remembered something make sure ur A/C. SWITCH IS OFF or it will give u false code. 51 specifically. If u still have it with the switch off. thwn re wire ur knock sensors

[btwilson86]

Originally Posted by Travis89Turbo

I just remembered something make sure ur A/C. SWITCH IS OFF or it will give u false code. 51 specifically. If u still have it with the switch off. thwn re wire ur knock sensors

It'll also give you a false code if you move the throttle, like revving it up... That's likely where your code 51 is from.

Also, when checking codes you do not start the engine. If it is blinking constantly with 1/4 second intervals, then there are no codes present.

Travis89Turbo, how did you gather the OP has a problem with the knock sensor/wiring when there is no knock sensor code present (code 52)?



OP, how much boost are you running? Are you referencing the stock boost gauge or an aftermarket gauge? I have not experienced it, but I agree with Travis89Turbo's first post, sounds like fuel cut

[Green7mgte]

lol..
you guys ..

when i first read the post I thought Fuel cut. but at 2k rpms?

did you do any sort of mods.. like shimmed the waste gate..
stock ct26 turbo starts to spool right around 2.5 depending on throttle position..
are you boosting when you experience this "lag" if so what is your guage reading.. if is peaking and not slowly climbing i would lean twords you pushing to much boost and unshimm your wastegate or turn down your boost controller..
and don't be retarded when playing with your engine..

but if thats not the case.. post what information you have.

[Travis89Turbo]

Originally Posted by brandon bowles

ok i use a bobbi pin and pulled code from car and it is 51. when you first turn the switch to acc. it just blinks real fast. then when you start the car blinks fast still. give the car some gas it acts up and then blinks the code. what could it be?not getting what it means on that page ignition switch

Brandon check out this link...http://www.supramania.com/forums/sho...dle-runs-rough
Have u messed with the tps?

I had a code 51 only whn my KS wiring was bad. I kno its not common but it has happened to others also I tried everything and finally someone said too try re wire so i did and it fixed it. more then likely he has the ac switch on.