ca not revving past 2k

Post by **USDM Silvia** » Thu Mar 20, 2008 2:00 pm

just swapped a ca in my 240 and got it running but its not wanting to rev any higher than 2k and starts choking at that point. ecu is not throwing any codes....im really lost as to why its doing this. i checked to see if there where any vacuum leaks and i couldnt find any. please help i need to get this car on the road its my dd.

Thanks in advance,zach

Post by **Chris859** » Thu Mar 20, 2008 3:44 pm

It sounds like your computer is in "limp mode" for one reason or another - usually a disconnected, improperly wired, or bad main sensor such as a maf will cause that problem.

Post by **rico05** » Thu Mar 20, 2008 3:45 pm

Bad MAF, or it is not wired correctly. But it is MAF realted.

Post by **USDM Silvia** » Thu Mar 20, 2008 5:20 pm

the ecu is not in limp mode nor is the maf wired incorrectly. wat else could it be?

Post by **dattodude** » Thu Mar 20, 2008 5:45 pm

lack of fuel pressure, or dirty fuel filter.

Post by **USDM Silvia** » Thu Mar 20, 2008 5:54 pm

ive got fuel pressure and got a brand new fuel filter

Post by **slo** » Fri Mar 21, 2008 1:13 am

it has to be the maf. either wiring or faulty maf.

Post by **USDM Silvia** » Fri Mar 21, 2008 10:36 am

i had it wired by one of the best nissan guys around and the maf is fairly new... this is really aggrivating if i cant figure this out i might pull it out and sell it and get an sr cuz im with out a car and its hard finding rides to work and back every day

Post by **Hayakus13** » Fri Mar 21, 2008 11:39 am

is your timing adjusted? check for vac leaks...

Post by **USDM Silvia** » Fri Mar 21, 2008 12:19 pm

timing is right and i have already checked for vac leaks and nothing has turned up. maybe it is the maf idk is there any diagram with colors?

Post by **rico05** » Fri Mar 21, 2008 3:39 pm

If it will not rev past 2k, it is a MAF issue. Any older Nissan does that. Try cleaning it. Try using another one.

Post by **mmm240** » Fri Mar 21, 2008 4:36 pm

I've had good results with MAF cleaner. Follow the directions and spray it good. Make sure to let it dry before you attempt to start it up.

Post by **USDM Silvia** » Fri Mar 21, 2008 5:42 pm

the maf isnt dirty and we tryed the ca maf and its still doin the same thing. dee wat do you think?

Post by **mmm240** » Fri Mar 21, 2008 5:47 pm

USDM Silvia wrote:the maf isnt dirty and we tryed the ca maf and its still doin the same thing.

I'm going cpu. Even If you aren't throwing codes. Sounds like the only thing left.

Post by **USDM Silvia** » Fri Mar 21, 2008 6:06 pm

idk if this makes any difference or not but its a mines ecu. i was told it was tuned for 550 injectors, z32 maf, and i forget wat else...

Post by **boost_boy** » Fri Mar 21, 2008 6:17 pm

USDM Silvia wrote:idk if this makes any difference or not but its a mines ecu. i was told it was tuned for 550 injectors, z32 maf, and i forget wat else...

There's your problem right there! Get a stock ecu an start from there. If you are sure your wiring is correct, take the advice of your fellow CA'ers and start looking at your suspect ecu.

Dee

Post by **mmm240** » Fri Mar 21, 2008 6:18 pm

USDM Silvia wrote:idk if this makes any difference or not but its a mines ecu. i was told it was tuned for 550 injectors, z32 maf, and i forget wat else...

So you are still running stock 370cc injectors and CA maf? Either way, swap in a stock ecu and see what happens.

Post by **AFSil80** » Fri Mar 21, 2008 7:21 pm

If you have different MAF than what your ECU is tuned for, that is your problem...

Post by **rico05** » Sat Mar 22, 2008 4:39 am

Thanks for sharing that little tidbit and letting us sound like broken records kiddo.

Yes, your issue is the ECU. Never run a preprogrammed ECU without talking to the tuner first. Throw that on eBay and use the funds to source a stock ECU. Mine's pours epoxy over their EPROMs so you will never get it out.

Post by **USDM Silvia** » Sat Mar 22, 2008 5:16 am

mmm240 wrote:
So you are still running stock 370cc injectors and CA maf? Either way, swap in a stock ecu and see what happens.

no im running 550cc and a z32 maf. does anyone have a stock ecu for sale?

Post by **AFSil80** » Sat Mar 22, 2008 1:32 pm

rico05 wrote:Thanks for sharing that little tidbit and letting us sound like broken records kiddo.

Eh, i was drunk and reinforcing what was being said.

Post by **NismoBgt** » Wed Mar 26, 2008 7:04 am

Cam Timing?

Post by **RotoryGuy319** » Wed Mar 26, 2008 3:41 pm

Maybe try your TPS

Post by **ca18detgabby** » Wed Mar 26, 2008 5:19 pm

my car idled real ugly and didnt like to go above 2k with a bad coil plug........

ECU sounds like a logical issue and when the proper specs arent been met, it wont run properly.

maybe a bad FPR........

guessing with nothing more than.... NOPE THATS NOT IT. doesnt leave us much.

tell us what you are running, what issue(s)(as usually it isnt just 1 thing) you are having, and what you have already checked.

as is with everything. Check all your grounds........... nothing likes to cause issues like a bad ground.

Post by **USDM Silvia** » Fri Apr 04, 2008 6:52 am

rico05 wrote:If it will not rev past 2k, it is a MAF issue. Any older Nissan does that. Try cleaning it. Try using another one.

i pulled the maf off and cleaned it and it still did the same thing. i then tried another z32 maf and still the same result. i have another ecu on the way to see if that is the problem. is there a wiring diagram for the z32 with colors?

Post by **Hayakus13** » Fri Apr 04, 2008 7:38 am

^^^,This should help....

zerothread/256699

Post by **zache803** » Sat Apr 12, 2008 8:18 am

hey everyone this is usdm silvia im just at a friends house and he was already logged on.....but anyway i took the advice you guys gave me and still nothing. i checked the wiring and it was bad, so i fixed it. got a stock ecu and put it on and when i tried to see if it would rev any higher it didnt. but then i did a diagnosis to see if it was throwing any codes and unlike with the mines ecu it was throwing codes 12 (maf) and 34. rechecked the wiring and my buddy redid the wiring the exact same as it was before . so we redid it and fixed the spark problem and now there arent any codes. so i got in the car hoping that it would work started it and it sounded a little better at idle, revved and STILL the same thing . i really dont know wat else to do. any other advice?

i saw that someone asked wat my setup was up above so here goes..t28fmic3" turbo backi believe theyre 550 injectors not really sure (theyre yellow?)hks 264 camsz32 mafkoyo rad

as for electrical ****afc neo which im still not sure how to use completely but i do have the hotwire on 7 in and 7outhks turbo timerhks evc VI250 flexa lite dual fans

cant think of anything else at the moment but wat else could be doing this?ps sorry about the long post

Post by **zache803** » Sat Apr 12, 2008 12:00 pm

update just went outside to try it again to show a friend wat was goin on and now the ecu is throwing 12 and 34 again. can anyone fix my problem?

Post by **biosehnsucht** » Sat Apr 12, 2008 1:59 pm

no telling what the mine's is set for, even if whomever you bought it from claimed to know.

stock ecu is not going to work for **** with 550 injectors or Z32 maf , you need a romtune.

Post by **zache803** » Sat Apr 12, 2008 2:26 pm

ok but i dont see how this would keep the car from goin over 2k... oh yea and just for ****s and giggles since i fixed the maf wiring i put the mines back on and it threw code 11 but when i put the stock ecu back on it threw code 55

ca not revving past 2k

ca not revving past 2k

Re: ca not revving past 2k (USDM Silvia)

Re: (rico05)

Re: (USDM Silvia)

Re: (dattodude)

Re: (USDM Silvia)

Re: (slo)

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Re: (Hayakus13)

Re: (rico05)

Re: (mmm240)

Re: (USDM Silvia)

Re: (mmm240)

Re: (USDM Silvia)

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Re: (rico05)

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