jeremy_04

when im at a light, the rpms surge real bad, every now an then it dies out, and it boggs real bad wen i first take off, i took it to get the computer scanned, but everywhere i went, the diagnostic tool said not responding, or no communication. could it be the computer in my car thats messed up?

94Blk5.0

I can't help with the scanning issue, but try cleaning the MAF senor(the wire exposed to the intake air), and cleaning out the thottle body/IAC. Also make sure that all vacuum lines are secure.

Side note: Probably would not hurt to change the fuel filter if it hasn't been done in a while and run injector cleaner and/or seafaom it (through the vacuum tree on the back of the manifold.)

jeremy_04

i changed the fuel filter a few days ago, also new cap and rotor, and i looked, theres no vacum leaks. wut do i ues to clean the mass air flow with?

kilgorq

Carb Cleaner. You may have a TPS problem. But if you can not get a reading from a scanner I would be looking for a bad ground somewhere.

jeremy_04

yea a coule of friends told me it was the tps, but i didnt wanna spend alot of money unless i new for sure. so if the computer was bad, would it make it run like that.

kilgorq

Yes. I would look for a used TPS just to verify that it will fix it.

But the no scan situation makes me think it is more like a bad gound connection to the computer or a bad computer. The TPS is 45 Bucks from schucks. I would seriously look at the grounds on you electrical system first. Especially between the motor and chassis. But also in the dash. A bad TPS will not make it to where you can not scan the computer. You might also try resetting the computer. I am not sure how to on this but I have fixed several problems by resetting the computer. Usually it is reset by unhooking the battery and leaving it unhooked for a short time. I usually leave it unhooked for about 30 minutes.

jeremy_04

well when i bought the car, it was recked in the front, really bad, but i cut the front end off and welded a new one on. so its possible wen they wrecked it, it might have broke a wire. also it blew both air bags, could that be a reason y its not reading?

mjr46

POSSIBLE bad grounds but more than likely if you took it to a place like autozone or any other place more often than not they don't have the ability or know how to operate their scan tool in any other mode then obd II...... you have to run what they call a koeo/koer test to pull/scan for codes on yours..and a the simple paper clip trick can do that and count the blinks on the check engine light while performing the test

jeremy_04

wuts a paper clip trick? and what do the blinks mean? yea i took it to autozone also and they dont no what the hell there doing. then i took it to a shop, and they put it on one of those cornwell scanners, and still nothing.

mjr46

the cut and paste function isn't working to well on my computer so go to the search link up above and type in DIY Koer/koeo tests and look for a link / post from JOEL 5.0 it'll tell you all you need to know