Car wont rev past 2k plus other issues

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10-13-2004, 08:06 AM

meccanoble

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Car wont rev past 2k plus other issues

have the following maintenance being done these next few days:

clean iacv
clean throttle
change front 02 sensors
change lower motor mount

things already done:
new fuel filter
new oil

issues:
car wont rev past 2k rpm
stripped threading on 02 sensors
fans wont cut off
crankshaft pos sensor code
camshaft pos sensor code
one 02 sensor is hanging due to bad threading
car has major misfire
idles arent consistent after drivin and high revving

hoping to solve 3/4 of these problems just by changing sensors and cleaning iacv and throttle but not sure why fans would stay on and why car wont rev past 2k rpm.

Car was running fine for a few days after motor swap and then things went crazy, car is possessed. I did research and some blame 2k rpm limiter on many issues but not sure what it could be.

I checked all harnesses, everything was plugged, i see no issues thus why car ran well (a good 250 miles) with no problems. My new spec stage II clutch chatters like a b*tch in first gear, hopefully motor mount replacement helps out wit this.

pray for me

10-13-2004, 08:11 AM

SonicDust187

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Yours so gay and so is your car. I told you multiple times to sell the dam car and move on. I think its your maf that is causing these problems.

10-13-2004, 08:12 AM

deezo

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Get rid of the MAF and get MAP sensor (to get rid of the MAF problems).

10-13-2004, 08:14 AM

meccanoble

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i know, i keep making these mistakes....oh well

its not maf, i tested another MAf, i get no MAF codes, more importantly i had maf issue before and it cuts off at 2500 rpm not 2000 rpm although car does similar thing just on different rpm, i can find some ways to rev past 2000 rpm but car does nothing even if i put gas until i get below or right on 2k rpm....

10-13-2004, 12:30 PM

meccanoble

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ok, i want to check grounds for MAF sensor. The position my maf is in, with the heavy vibration my car makes, i wouldnt be surprised if the cables were stretched more than they wanted to be and something came loose. I just thought i would get a code if this was the case. What grounds in particular should i look at if my car doesnt want to rev past 2k?

10-13-2004, 12:54 PM

Kevlo911

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Dissconnect the MAF, does the car act hte same?

10-13-2004, 08:25 PM

Toolrocks

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Make sure the ECU reset screw is in the proper location and you don't have any intake leaks after the MAF. Good luck, that sounds like a B.

10-13-2004, 11:46 PM

Lonely Driver

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Coolant temp sensor.

10-14-2004, 07:44 AM

Pappa Grande

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Once, my car wouldn't rev past 2000 rpms and the problem turned out to be the Exhaust. You may also have a clogged cat. Obviously your car has all sorts of other issues...

10-14-2004, 09:34 AM

#10

maxboogie

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i got a nice 86 hyundai that gets up to at least 4,000 rpms, whom wanna race.
seriously something is either loose, air leak, or check connections to computer.

10-14-2004, 09:49 AM

#11

meccanoble

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i have an 02 sensor completely off the y-pipe, i did a few things and car seems to run a little better, start a little better.

I am waiting for autozone to get 2 sensors so i can put them in

the codes i am getting now are:

7 4 - evap sensor?
8 3 - absolute pressure sensor
1 1 - camshaft position sensor?! i put 3 of these b*tches in, and car starts up fine, dont know why this keeps coming up.
2 8 - Undefined, unless its supposed to be 2 9 (right bank running rich) due to missing sensor?

Also my fans wont cut off. I checked all connections, everything seems fine. I'm gonna video the issue.

10-16-2004, 09:33 PM

#12

meccanoble

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oh god, exhaust is complete, i'm getting 3 codes....

07 04

08 03

02 08

evap sensor, map sensor and cooling fan sensor....

my dam car worked for a second after i played wit the wiring and reset the ecu....then i could rev past 2k rpm twice, then it started acting stupid again....wtf

plus my idle cant be fixed no matter what, i just dont understand it...i'm hoping my ecu is bad and not wiring, wtf should i do

10-16-2004, 10:18 PM

#13

meccanoble

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iight, me and a friend on org narrowed it down to one thing. Harness has a loose wire somewhere....dam this sucks, i have no idea how to change harness....

any instructions anywhere? this is over my head but i dont know what to do and i dont want to go to nissan where they'll charge me a grand....F*CK my life!

10-17-2004, 08:05 AM

#14

Toolrocks

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If you've got a multi-meter with continuity check/diode check use that to test between the ECU harness and the connectors in the engine bay. I'd recommend an FSM so you know where the harness are located. Also, I think some 4th gens had problems with the main harness breaking at the bend near the timing chain cover and cylinder #1. Hope that helps, good luck.