I cant take these stupid ca18det problems HELP

[EfiniRX7]

Ok, The car idles perfect but wont take any revs. I got another MAF, changed fuel pump to a brand new walboro, checked all of my vacume lines, and scowered the net for any problems or things I could have missed. I dont get it. I put a KA MAF on the car and it would rev up(like crap) if I feathered the gas. I have checked the MAF wireing so many times I can recite the color order in my sleep(looking down on the maf left to right G/Y, B/W, B, G/B). The car even starts fine. Could the ecu be bad? I have no idea. One last thing I noticed was when the car was cutting out and backfireing it sounded coordinated, like it was on a 2step. HELP please I need to figure this out, I have ben chasing this problem for a month or so. I was also thinking grounding problems. I leand away from grounding issues because it idles perfectly and starts up with no problems.

[mbmbmb23]

Timing?

[lostmenoggin]

it is possible that the maf circuitry in the ecu got fried. i had that happen to me and i have heard of it happening to others, but luckily i had an extra ecu laying around that got my car running. There is a guy around here somewhere that can fix your ecu if indeed that is the problem but i can't remember what his screen name is. sorry..

edit: after a quick search i found the guy.... his SN is BEST1TUNING.COM

[ca18detgabby]

yep those SOHC MAFs have cooked a few ECUs locally.

isssues idling up can be the ECU in limp mode(wont rev past 2000RPMs IIRC)

if the car will rev up but has issues raising in the RPM band at certain points......... you have issue with coil packs/plugs.

[float_6969]

This sounds like ignition to me.

Check the igniter and coils.

Have you checked the spark plugs?

[EfiniRX7]

I have checked all of the ignition stuff. I set the timing to 15 btdc. I think the most probable issue would be a cooked ecu. I think the first maf that came with the car was the wrong one. The car sounds like its in limp mode. If I open the ecu will I be able to see if its burned up? The wierd thing is when the car has an actuall ca maf it idles good but wont rev past 2k. When I put the ka maf in it would not stay running, and did not idle good when it did.

[ca18detgabby]

sounds like tell tale signs........

[EfiniRX7]

I just put the timing light back on. When the car is at idle the timing is at 15btdc. I slowly give the car gas when watching the timing and it moves right from 15 to 20, when the mark gets on 20 thats when it starts cutting out. I dont think the timing should move, should it. If the timing should not move what could be wrong, and what tell tale signs are you talking about. I should also add that the car does not smoke at all, and compression was good and consistan across all cylinders.

[ca18detgabby]

you ECU sounds like it is in limp mode.

IIRC that isnt the same as cooked. i would try un plugging the ECU and letting it reset itself and see if that solves the problem.

[EfiniRX7]

Ill try that, and could it be possible that the timing should be set to 10btdc. I just think its wierd that the car is good untill the timing hits the 20 mark on the crank pully. Im sorry for the stupid question but what does IIRC stand for?

[bentvalves]

IIRC means - If I recall correctly -

[boost_boy]

I have checked all of the ignition stuff. I set the timing to 15 btdc. I think the most probable issue would be a cooked ecu. I think the first maf that came with the car was the wrong one. The car sounds like its in limp mode. If I open the ecu will I be able to see if its burned up? The wierd thing is when the car has an actuall ca maf it idles good but wont rev past 2k. When I put the ka maf in it would not stay running, and did not idle good when it did.

Sounds like you may have damaged components in your ecu. Do a diagnostic check on the ecu and let us know what it reads. Damaged AFM circuitry is not uncommon, but don't rule out a bad crank angle sensor or even a broken camshaft CAS drive key. This all falls back on to what some of the guys said in the fact that it is definitely ignition related. But for shiznits and giggles, find a way to connect your AFM directly to your throttle body and see how the car revs then. If it does rev out, then your problem lies somewhere in vacuum leak country, especially via the intercooler piping. If it does the same, revert back to the latter tests. Follow the advice given and you'll soon figure this issue out. If you deviate, then good luck anyways.

Dee

[EfiniRX7]

^ How do I run an ecu diagnosis to tell if its cooked? Is doing an ecu diagnosis a function of the ecu via the little turn screw on the side of it? I will most definetly try all of these things and post the results. Thanks for the quick responses.

[busteds13]

the Full Service Manual, ie :FSM can be found in the stickies, and takes you through a steb by step procces on how to utilise the ECU diagnosis modes and how to read all of the codes ittl throw at you, download, read, goodluck!

[EfiniRX7]

I have beaten the JDM people. I figured out the problem and now she runs perfect. The FSM's I downloaded were scanned upsidedown. I found a correctly scanned FSM and figured out the wires on the maf were opposite of correct. The wire coating was also missing so I could not use that for help. Im just glad Im not a complete retard. Thanks for the help.

[float_6969]

Glad to hear you got it figured out!