officer4c13

i think i have a blown head gasket but im not sure. whats going on is the car is ackting like it is mising but i have checked for spark in all cylinders and they are all good. i think a head gasket is blown between 2 of the cylinders. it is lacking in power, surges at low rpms wile going down the road, stals wile taking off, and some times shuts off when at an idle.
can any one give me some advice on what it could be other then a head gasket.

1991LX5.0

could be a couple different things. Did you check the basics like timing, fuel pressure, TPS ect. yet? If you think it blew between two cylinders i would do a compression/leak down test

rmodel65

have you done a coolant pressure test to see if its leaking pressure?

officer4c13

i did a compretion test all around 100-125 psi. and i dont think its the fuel psi becuase it only stals out when i berly push on the gas its fine when i floor it. and i dont have a tester for the coolint but i know the hoses have good psi when it is runing. it also seems to be burning more oil then it did before.

drhoward

check your oil for coolant.....that is always a good way to start

if you have a blown head gasket it will be a nice murky/milky colour

officer4c13

oil is fine, if a head gasket blows right between cylinders in just a small spotwould it leek or just push air between cylinders?

drhoward

hard to say,

I blew one out last fall and my car would over heat alot under heavy throttle, and I had coolant in my oil

officer4c13

mines not geting hot, i think i will end up pulling the heads to do the gaskets at the same time i will replace all the old britle plastic vacume hoses with real rubber ones.

Hung Like a Stang

check compression, two cylinders low in compression adjacent to each other = blown head gasket.

officer4c13

it is burning more more oil then it was so im prity sure its the head gasket ill let you all know after i get it apart