i have a 1995 chevy blazer it runns high for about 10 to 15 minutes starts running realy rough and dies i think somthing is heating up the brain so last time it did it i changed the brain and it re started and run for a nother 10 - 15 minutes and died what could be killing the brain

i have a 1995 chevy blazer it runns high for about 10 to 15 minutes starts running realy rough and dies i think somthing is heating up the brain so last time it did it i changed the brain and it re started and run for a nother 10 - 15 minutes and died what could be killing the brain

What is running high?
What engine and engine code and computer and dist setup?
Flat top or old style dist cap?
Computer on fender or inside cab?
What brain did you change?
New or used or rebuilt?

Does it do it all of the time?
Have you checked for lose of fuel pressure or los of spark when it does it?

What is running high?
What engine and engine code and computer and dist setup?
Flat top or old style dist cap?
Computer on fender or inside cab?
What brain did you change?
New or used or rebuilt?

Does it do it all of the time?
Have you checked for lose of fuel pressure or los of spark when it does it?

it hasengine code wwith spider injector and brain is on fendor the motor is used but i changed timming chain oil , pump and seals it is loosing fire when it dies ive got to coils with the spark control i guess ind it does it to both

it hasengine code wwith spider injector and brain is on fendor the motor is used but i changed timming chain oil , pump and seals it is loosing fire when it dies ive got to coils with the spark control i guess ind it does it to both

yes it does it all the time the fuel pressure does not go down i just put in new fuel pump and filter

yes it does it all the time the fuel pressure does not go down i just put in new fuel pump and filter

What brain or part did you change?

If old style dist check ign module and ign if you are losing spark.

What brain or part did you change?

If old style dist check ign module and ign if you are losing spark.

i changed the brain under the hood i have to one that come with the blazer and one that come with the motor why is the brain heatin up and killing my fire

Could be losing compression after the engine warms up. Do a compression check on your cylinders and get back with the results. Did you already check for sure that u are loosing fire?

Could be losing compression after the engine warms up. Do a compression check on your cylinders and get back with the results.
ive done a compressin test and they are all over 150

ive done a compressin test and they are all over 150
yes i have a sprk tester thaplug in the spark plug wire and then the other end plug onto the spark plug

When you keep talking about brain are you talking about your ignition module or your ecm?

When you keep talking about brain are you talking about your ignition module or your ecm?
yes

yes

Yes to which one???????

Yes to which one???????
ecm on top of puck tank on passenger fender

ecm on top of puck tank on passenger fender

You need to check your ignition module it should be beneath your coil packs. And what is a puck tank????????

You need to check your ignition module it should be beneath your coil packs. And what is a puck tank????????
radiator over flow tank i have a disttibutor it is next to the coil i have one of my blazer and one of my new motor and when it died the first time i thought that might be it and tried that it did not work

Everett I apologize but I've been having a hard time understanding you. If I'm getting this correct now I think you just need to stop looking at the ignition all together. Are you saying that literally your ecm is getting hot, very hot to the touch after running the car for ten minutes, and that literally would not start till you have installed another one?

If so, something in your wiring is shorting out something in ecm with the key in run position. And hence it gets hot, fries, and you loose your spark, not necessarily something wrong in the ignition system as far as coil, ignition module, crank sensor, it could be anything at all with the key in the run position shorting out a circuit in your ecm.

Everett I apologize but I've been having a hard time understanding you. If I'm getting this correct now I think you just need to stop looking at the ignition all together. Are you saying that literally your ecm is getting hot, very hot to the touch after running the car for ten minutes, and that literally would not start till you have installed another one?

If so, something in your wiring is shorting out something in ecm with the key in run position. And hence it gets hot, fries, and you loose your spark, not necessarily something wrong in the ignition system as far as coil, ignition module, crank sensor, it could be anything at all with the key in the run position shorting out a circuit in your ecm.
the brain dont get hot to the touch

Once again, I still have trouble here, you need to be specific, I said could you not get the thing to run at all until installing the other ecm. But I saw back where you replied to another so I don't think that that had anything to do with anything now.

You need to check your ignition module.

I misunderstood you a few posts backs I saw you had more than one coil so I thought you had coil packs, I believe you were talking about one off a different motor. Have you tried another coil yet?

[quote=ctwright;5952852]I misunderstood you a few posts backs I saw you had more than one coil so I thought you had coil packs, I believe you were talking about one off a different motor. Have you tried another coil \yet?[/quote

yes i have

What about your ignition module, have you tried another one of those yet?

What about your ignition module, have you tried another one of those yet?
yes did not help

yes did not help
im wondering if its he crank posiiong sensor

ive ben working on it to day and when the motor starts messing up and want to die i plug up the crank case breather and it will stay running i think it is the egr valve was any one heard of the egr messing up and doing this

ive ben working on it to day and when the motor starts messing up and want to die i plug up the crank case breather and it will stay running i think it is the egr valve was any one heard of the egr messing up and doing this

now i notice that the pipe behind my new catolitic converter is glowing super hot could my o2 senser making it dump to much fuel and heating it up

now i notice that the pipe behind my new catolitic converter is glowing super hot could my o2 senser making it dump to much fuel and heating it up


Sry took so long to get back, I figured I wait till you find the problem yourself. You found the problem, nothing to do with a sensor making it do anything, you need a new catalytic converter, or gut that one out is what I'd do. Don't keep trying to drive it till it's fixed it can screw your motor up. It's clogged.

Sry took so long to get back, I figured I wait till you find the problem yourself. You found the problem, nothing to do with a sensor making it do anything, you need a new catalytic converter, or gut that one out is what I'd do. Don't keep trying to drive it till it's fixed it can screw your motor up. It's clogged.

it is a ne catolitic covertor just spent 177. dollars for it

it is a ne catolitic covertor just spent 177. dollars for it


Well, I hate to break it to you but you just spent 177 dollars on a new clogged catalytic converter. Either that or you paid 177 dollars for work that they didn't do and the shop lied to you.

i pulled off catolitic converter and it does not help runs a little while and still diesi think it is jumping time and loosing vacum

i put it on my self no shop

When you did a compression test did you do this with the engine cool, you need to do it after the engine dies again(if you haven't already), be gentle taking the plugs out.

I am not sure if you fixed your problem, but I had a 1993 chevy s10 4.3 vin w having the same problem. It would run until it got at normal operating temperature and then would die. I chased everything, it didn't give me any codes. I finally replaced the spider fuel injection and cleared problem. Go figure.