94 chevy k5 blazer works fine cold problem is that when it worms up it stalls backfires into the exauhst and losses power and turns off

1989 Chevy blazer 4.3 won't start..I have ... - CarGurus

www.cargurus.com > Questions > Chevrolet > BlazerCarGurusJan 30, 2013 - 96 Chevy S10 Blazer with 4.3 L engine vortex will turn over but won'tstart. ... i a 93 k5 blazer 5.7tbi in cold weather it will not start, if i hook jumper ... was told it just needed a Fuel pump, I replaced the Fuel pump, and the Filter, ...

Replace your alternator its loose power and backfiring because you dont have enough voltage/amperage to run the pcm ignition module and fuel pump. At least thats a best guess with what little info I have to work with

fuel filter or fuel pump chevy didn't add fuel pressure sensing to its ck engine computer till 2011

and sorry to tell ya but blazers have a common prob with fuel pumps going bad , just ask a parts guy on how many he sells a year , you;ll get the sad story

You know what it is also

You have white smoke out the exhaust

You surely know that is a blown head gasket

Have you checked Google I found this hopefully it's not your timing or it may be flooded but doubtful have you tried spraying starting fluid into the intake while cranking it

Check your idle air control valve. My 88 K5 was idling very high because the fooking thing was stuck in the open position. Good luck.

ck fuel pressure ,ck stoped up cadilic converter ck cam for bad lobe sound like that what makeing it pop ck valve springs

Do a compression test on all of your cylinders when it is cold. Backfiring is a sign of a worn valve seat allowing mixed fuel and air (lit by spark) to be forced back into the intake. You will probably see compression loss on one or more cylinders.

Also... there is a chance that the EGR valve is not totally seated when the engine is cold with just a small blow by. The EGR valve seats coke up over time with black gunk.

usally back firing and no codes is a bad fuel pump or clogged pickup screen which is on the fuel pump.. you can get alge from the blended gasoline. see if you can run a prssure gauge to the out side of the hood and drive the truck, when the problems starts to happen look at the pressure. we had a k5 blazer do something similar. it would have 57 psi at start up and about 10 miles into dribving it we would have loss of power adn backfiring through the trottle body. feul pressure would drop to 17 psi. our pick screen was full of black alge from water in the gas.

replace the crank sensor behind the egr valve. it worked for me after i spent nearly 500 on other sensors