WaOnFiRe

I was gonna take my car to a paint shop for some ninor work in the engine bay to make it look better...

Yesterday I took the car to the paint shop to have the cost of paint evaluated. When I was coming back, the car was nearly dying at lights so I had to keep the foot on the gas and brake pedals. Sometimes I gived it some and the engine didn't reved higher when I was looking at my RPM tach. I put 10$ of premium fuel on my way home thinking maybe my dash wasn't showing me the right amount left in the tank.

Today when I was gonna go give my car to the paint shop, it started right up, ran for 2-3 secondes and died. Tried to restart it and started right up and stalled again. I did it for about 5 times and it always started and died. This summer I have replaced the cap, rotor, sparks plugs and the wires, air/fuel filters, battery...

It's not trowing any codes... What do you think is going on?

HalfInchWrench

IAC valve and throttle body need a good cleaning. Try a search on IAT by the username VADER and you will get the correct procedure. If you don't know when it was done last then now is a good time. It's quite easy.

Check your fuel pressure.


Try those two for now and we can go from there if it didn't fix it. Report back on your findings anyway.

WaOnFiRe

I wan't to try cleaning my IAC and throttle body. But I can't seem to find the tech articles with the search engine.

Can I just spray the fluid in front of the TB while I give the motor some gas?

WaOnFiRe

I no mechanic, I all did in my life is change my battery, air filter and cap and rotor. Did not even change the spark plugs and wires since it looked like a pita...

Hope I can try some things myself before taking it to my mechanic.

david roush

iTrader: (1)

Like halfinchwrench said, check fuel pressure and get yourself a $6 noid light to see if the injectors are firing.

WaOnFiRe

I will go buy some stuff at Canadian Tires tonight. Someone can help me find the tech articles to clean the TB and IAC? Should I clean my plenum, runners, etc too?

david roush

iTrader: (1)

https://www.thirdgen.org/techbb2/sho...le+air+control

Look for Razors response on cleaning the IAC

david roush

iTrader: (1)

Razor but Vaders

WaOnFiRe

Okay guys...

I cleaned the IAC and TB and it didn't helped.

So I took it to my mechanic and he checked out all the small things he could without finding anything. When he wanted to monitor what the sensors were reading and all, the car would always die and it even freezed his scanner! He never saw that he said! Happened 2 times. He tought it was either the fuel pump, computer or the EGR. He said to go to Canadian Tires to get it on a big machine so they can test it more. Canadian Tires found out it was my computer that was faulty. When the car was stopped, it continued to say the car was running at 500RPM. So they tried to give a couple of hit on the computer itself and the car ran fine, a couple other and ran bad and died like before.

Is this a common thing in our cars to happen? Do I need to change the EPROM too or just the computer itself and keeping my EPROM? Can I get another brand or should I stick with Delco? The guy at canadian tires say he can get a Niehoff brand computer for 150$. At GM dealer it's 248.75$. Can I buy it on the Internet for cheaper?

Thanks

WaOnFiRe

Someone know the answers that were in my last post before I do something stupid? Thanks

subroc

iTrader: (2)

I would not take chances and just bite the bullet and buy the EPROM and computer. You could try aftermarket but I trust the factory stuff more. Plus if you get a new EPROM it will be an updated PROM and you will notice a difference in the way you car runs and drives.

WaOnFiRe

That's what I tought, I should stick with Delco for the brand of the computer...

But do I really need to change the EPROM? It's only a stick with information, it doesn't have any wires and stuff like that it should be okay no?

They ask for 248.75$ (canadian) for a remanufactured computer from Delco. But I have to give my old one in exchange.

Can I find a remanufactured remplacement online for less?

Rob Wade

Do not buy an aftermarket reman. Junk Junk Junk I went through 4 of them before I got one that worked correctly without firing out a code or had a temp reading of 250* even when it wasn't running!! Gm remans are made by the same company. I know my brother is a gm parts guy, and I had to listen to him say "I told you so"!! Get a brand new GM computer and reuse your prom. It will cost a little more but there is a BIG quality difference.!!

HalfInchWrench

GM stuff only in my opion. Don't buy anything made by Niehoff, that stuff is garbage.

WaOnFiRe

So a gm remanufactured one is all right? I don't need a brand spanking new one?

HalfInchWrench

A working used one would be fine or a reman. from GM. I didn't think GM made new ones. Do they?

subroc

iTrader: (2)

Nope you cant get a new ECM anymore. Best bet is a GM remanufactured. I would get a new prom if i were you because with the updates over the years your car will run better and shift smoother. I put a new computer and PROM in my car and noticed a huge difference in the way the car ran. Its not that it was any faster, but it just ran smoother. Not to mention it shifted better as well. Its up to you of course but my two cents is by the updated prom as well and cross that off of your list of possible problems.

Damon

Before you throw money at the problem try at least one quick diagnostic test first- unplug the MAF sensor (round sensor in the intake hose between the TB and air filter housing). Sometimes a MAF will go bad and give you a start-then-stall problem. ECM doesn't look at the MAF until the engine is over 250 RPMs. So when you're cranking on the starter it's not looking at it. As soon as it fires up it looks at it, gets a bad reading, injects the wrong amount of fuel and the engine almost immediately dies.

It's a long shot, but worth a quick check. Unplug it and fire it up. If the MAF is bad it'll suddently run about 90% better. Don't drive it around much like that- it's only a quick diagnostic check, not a fix. Longest you should drive it like that would be to the parts store to buy a new MAF.

WaOnFiRe

Not a bad idea, I'll have to check it out. Thanks!