power issue
 

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??????

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

power issue
 

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.

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

power issue
 

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

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

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

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.

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.

i doubt he has a code 51..
he said he didnt receive a code till he turned the car on.. and moved the throttle. .. soo.
still check for boost leaks.

Do check for boost leaks but code 51 and 52 are not stored in the ecu they are real time codes so the only way to check them is if the car is on and running... but your right he shouldn't check it while reviving it up. He needs to take a drive with the jumper out and if the check light comes on go check the code while car is still running at idle. Don't shut the car off or the code will clear

its funny were still discussing this but he hasnt posted back in acouple days.. LOL.. boo

Pull your EFI fuse, 15A in engine compartment fuse box. Leave the fuse out for a couple of minutes. This will clear loged codes, turning off the ignition will NOT clear codes.
Start the engine and go for a short drive. The ECU will go through a "learing process" for a short period of time.
Return home and check for codes again.
This will give you which code(s) are active and not loged. If you have codes, let the them run through two or three times to make sure you counted correctly.
Fuel cut @ 2400RPM, I doubt it.
Vacuum/boost leak is a posibility. However, if you have an active 51 code, most likely it is an issue with the throttle position sensor or wiring.

If u pay attention to what I posted I said code 51 and 52 do not store in the ecu. They are realtime codes so yes the second u shut the key off, those codes ONLY will clear.....

I agree with Green7mgte why we discussing this still when the poster isn't keeping us posted? We don't even kno if he actually has any codes. I'm out!!!!!!!_!!! :gtfo:

power issue
 

ok i have fix the problem change the MAF back to the stock one and now the car runs great till i hit fuel cut. so now i have to get a regulator to build up the fuel to bout 58psi right? cause it still has the stock regulator which produces 38-40psi. once i hit fuel cut i have give it a min to build the fuel pressure back and then go again.

Jebus.... I'm gonna smack someone...

OP's describing limp mode.... there's a critical fault in the system.

Code 51 is NOT related to ANYTHING to do with knock.

Code 52 DOES store in the ECU; Code 51 does not... it's one of the few real-time codes.

We done now?


OP, how much boost are you trying to run?

power issue
 

ok now i have code 14 an 34. 34 would that have anything to do with wiring from the boost gauge being cut? 14 not for sure. now when i start the car and go down the street when the car trys to boost it acts like fuel cut in 1-4 gears and in 5th but after hitting it like 3-4 times it will boost all the way up to 9lbs and act fine as long as i dont hit fuel cut. I HATE FIXING OTHER PEOPLES FUCK UPS!!!!!!