Under load my CA has no power off boost

Post by **jdm s13** » Tue Jul 17, 2007 3:05 am

no don't scrub it. don't touch it with anything. just give it a good spray. don't use carby/throttle body cleaner because that leaves a sticky residue.

Post by **Masterdebater** » Tue Jul 17, 2007 8:34 pm

nah no luck there....fuk...im stuck paying someone to fix it i guess.

Post by **jdm s13** » Wed Jul 18, 2007 8:42 pm

Masterdebater wrote:nah no luck there....fuk...im stuck paying someone to fix it i guess.

You have checked for vacuum leaks right?

Post by **Masterdebater** » Wed Jul 18, 2007 9:38 pm

i have a small one in the back by the #4cyl so to say... back by the break booster. sprayed some break cleaner back there and it made it bog so i know teres one back there.

Post by **jdm s13** » Thu Jul 19, 2007 4:15 am

If they are cracked/ split cut off the bad parts or replace the hole line. See if that fixes the problem.

Post by **syphrus** » Thu Jul 19, 2007 7:09 pm

My car was having the exact same problem. I cut the ground to the MAF and added a direct ground from that to the body. Cars been doing fine now. But from my experience, those problems are vacume leaks, boost leaks, and mainly MAF. check and recheck it.

Post by **240sxbobbis** » Thu Jul 19, 2007 7:49 pm

another happy camper

Post by **Masterdebater** » Fri Jul 20, 2007 6:27 pm

just changed my spark plugs to NGK bkr6e's and gapped them to .030 and STILL have the dam problem. ive also cleaned the maf, chenged vacuume lines around, disconnected the BOV graounded the head, grounded the ignitor, cleaned out my cat.,checked compression (160 across the board),checked vac leaks (one small one in back of motor. i have a Vortec rising rate fuel pressure regulator too but u think that would work if my stock reg. is bad?

Post by **ca18det240hatch** » Fri Jul 20, 2007 6:42 pm

Does it hesitate until 3 and then hits boost and buggers off?

Post by **Masterdebater** » Fri Jul 20, 2007 6:56 pm

it gets to 3000 just fine but once it gets to boosting it just makes a put put sound lmao

Post by **syphrus** » Fri Jul 20, 2007 7:12 pm

Hmm.. different situation. I know you probobly have, but did you check for leaks in the IC piping. I know that will cause a problem like that. Sounds like some kind of turbo related illness since most ca's begin boosting at around 2-3. (i think, im pretty new to this and besides, my tach doesnt work) just go from easy to hard, sucks not being able to figure it out, but when you do.

Post by **Masterdebater** » Fri Jul 20, 2007 11:01 pm

yea i checked the ic piping for the most part. ima take it all apart tomorrow. and change the regulator

Post by **jdm s13** » Sat Jul 21, 2007 12:59 am

ca18det240hatch wrote:Does it hesitate until 3 and then hits boost and buggers off?

Thats what mine was doing and just under a week later its started it again!!!

Post by **Masterdebater** » Sat Jul 21, 2007 4:06 pm

ima try that vortec regulator on my car. i just hope it wont lean out my engine and fry anything lol. how can u tell if the reg. is a 1:1 ratio

Post by **Masterdebater** » Sat Jul 21, 2007 7:44 pm

still stumbling. buuuut... if i just do partial throttle then i can rev as high as i want. but once i throw boost in it, she bucks like a bull. maybe i need to check for boost leak....this damn engine is pissing me off.

Post by **driftin8ez** » Sat Jul 21, 2007 8:07 pm

im kinda jumping in this late... But, Whenever i think i may have a leak in my ic piping i try and drive the car with the maf unplugged. If it idles better and seems to drive better up to 2500 rpm then i really try and hunt down the leak. Other wise it could be something slightly more serious.

Post by **float_6969** » Sun Jul 22, 2007 4:42 am

OK, I'm confused now, I thought the car ran fine on boost, but stumbled off boost. But now it sounds like you're saying it's fine below 3K (off boost) but stumbles on boost.

Probable Solutions:Stumbles off boost: Leak in piping, intake manifold, brake booster line, etc. Maybe bad MAFS.

Stumbles on boost: Bad ignitor, coils, or plugs. Maybe bad MAFS, but unlikely.

Post by **Masterdebater** » Sun Jul 22, 2007 2:18 pm

as long as i dont put any load onto it to boost i can rev as high as i want but once i punch it to boost then it just stumbles. in other words it wont boost at all

Post by **jdm s13** » Thu Jul 26, 2007 8:42 pm

Masterdebater wrote:as long as i dont put any load onto it to boost i can rev as high as i want but once i punch it to boost then it just stumbles. in other words it wont boost at all

made any progress? i sure haven't.

Post by **Masterdebater** » Thu Jul 26, 2007 10:57 pm

im toolazy right now. goin through some shyt so yea....maybe im losing air through an injector o-ring on cyl #4...ill find it tho. but its weird how just a lil bit ago my car ran fine and now its allweird...maybe its this home fabricated boost controller.

Post by **Masterdebater** » Fri Jul 27, 2007 2:15 pm

yea it was the shyty boost controller i made. now i have it retuned and now she runs like a champ again!!! now i dont want to have to sell it ((

Post by **jdm s13** » Sat Jul 28, 2007 3:00 am

LOL! at least your problems fixed now mate.

Post by **Masterdebater** » Sat Jul 28, 2007 12:10 pm

yessir just check around for a vacuum problem...its not a boost leak its most likely vac...

Post by **jdm s13** » Sun Jul 29, 2007 3:12 am

Found mine. I cleaned out my PCV and BAM leaking from there!

Post by **Masterdebater** » Sun Jul 29, 2007 12:23 pm

woo!!!! well done sir i believe this thread is done now.

Under load my CA has no power off boost

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