i have another thread in the lt1 section adn havent had much luck. but anyway now they are telling me that it is my computer. i had the madz28 tune done over a month ago, keep that in mind. could the computer be giving me all these problems? and how do i go about fixing it? please help



ok went and bought the maf and installed it. then unplugged battery for 20 minutes . the code was ogne. about 2 minutes after driving the code pops back up and i head straight ot autozone for them to figures this out again! he comes and the same codes are thrown and afew more. this time a total of 6 codes are relating to the maf. but its brand new. so he sits there and messes with my car for about ten minutes and comes up with this.
he says my car is either getting to much fuel or too much air. he says that my vaccum seems to be fine, he visually inspected it! so he says that something in my computer is messed up telling me that i need more air to be equal to the amount of fuel coming in! do u guys think he is right? please help as i am scared to drive my car anymore.
p.s. i did have my comp tunes over a month ago and these symptoms have only been over the last week! but i dont know it could have somthing to do with that. thanks in advance

 

Well, if the MAF isn't working right, the car will run in SD (speed density) mode which won't hurt it.

Have you verified that the wires that connect to the MAF get the proper voltage and they they're not broken or anything? A short could be causing this problem. I know someone who's had problems with his MAF connector (the wiring itself) and had to rebuild the connector at least once.

 

well while the car was running i unhooked the maf and it shut right off! does that say anything?

 

That makes absolutely no sense to me. I can go start my car and disconnect my MAF and the car will stay running.

 

any moe suggestions, i am totally stumped

 

ok instead of unplugging the maf i unplugged the map and the car has been driven and has sat around for around half an hour now an dseems to have ran fine over this period of time! any clue

 

If you unplug the MAF while the car is running it may shut it off, try unpluging it while the car is off & then try to start it.

 

either way i do it, it stils messed up. with the maf unplugged from the get go, it just takes longer for it to get started! but with the map unplugged it runs fine so far! make any sense, i contacted madwolf and he said it wasnt the tune, i called becuz some people said that could have been the problem! but no. i have been pretty aggresive with the connections at the plugs with the car running, so the connection at them 2 points is fine. i am confused and about to give up

 

ok i took the car to my neighbor who is a mechanic and he has one of the bad *** obdII scanners. anyway he ran the codes adn watched the way the car was runnning and here is what he came up with: map sesor low voltage, he say the reason for low voltage and it not running correctly is because of the tune and the 160 therm, he says it is running really rich and overloading with fuel. and the reason it starts up sometimes and not others is there is to much fuel on the plugs and when it dries off the car will start( somthing along them lines) what do u guys think. he says to get rid of computer tune! or put the stock thermostat back in!
i would do this but if that was the case then y hasnt everyother person that got there car tuned doing the same thing i am! what do u guys think

 

I'll tell you that if anything Ion probably leaned it out some when he tuned it.

I think it's something else.

MAP low voltage is different than the MAF codes you originally mentioned. If you're getting MAP errors, try replacing the MAP sensor.

If you think the engine is getting too much fuel, try holding the gas pedal to the floor during cranking, this puts the PCM into "clear flood mode" and might help it start, but won't fix the problem.

I know that faulty o2 sensors and exhaust leaks can cause the PCM to think it's lean and add more fuel to the car, actually causing a rich condition. o2 sensors are not cheap, but it might be worth a shot.

There are just too many people running Ion's tunes with low-temp thermostat for that to be the cause of your car's problems. Every car is different, but I don't really see your car being so different that it goes totally opposite everyone else's.

Good luck!

 

There are just too many people running Ion's tunes with low-temp thermostat for that to be the cause of your car's problems.

^^^^ yes that is exactly what i was trying to tell the guy, but him being the " best" mechanic he wouldnt swallow his pride and help out any longer! he was stuck on the tune or 160 thermo was the problem. but how would that matter if the car has sat overnight and cool that it now needs more fuel to start! dunno
and the map sensor was the first thing that i replaced, it didnt change anything. but it does run better with it unplugged! but i returned both map and maf and i back to the original ones! i am going to check the tps and iac, i just cant find the lil ole tool to do it!
and the o2 sensors, does ion delete teh codes when he does his tune. reason i am asking is cuz i told him i was gettin headers soon so he might as well delete them now, so i dont have to send it back!

 

one more thing. i went out just now to take the tps and iac out, and remembered something! on top of the throttle body there is that lil black thing with 6 tork screws holding it in. anyway about a week ago i took it off to see what its purpose was, it had a gasket on it. anyway i just put it back on the same way i took it off. well when i was out there just now i took it off again, thinking that could have something to do with it!, and the gasket had manuevered it self to where it was blocking off whatever was supposed to be going through it! so could that have anything to do with this problem? and csn i put it back on without the gasket , cuz it is now trash! just use some rtv sealant or somthing! that will make it airtight and wont block the passage way! any suggestions