b18vteceg

im pretty good with these motors but this one has me a lil stumped....

i bought truck with blown head gaskets....

i replaced all upper end gaskets and motor ran fine for about a month then it started bein a very "cold blooded" mother....

if i start it and try to drive away the motor falls flat on its face and dies....

you have to let it warm up for about 2 to 3 mins and then its runs like a champ the entire day.....this problem only happens when its SUPER cold....

i replaced MAF, all spark plugs, checked shim clearance on cams, checked timing....and the problem is still there.....

like i said the motor runs awesome.....just for those few mins in the morning its like it doesnt want to wake up....

any help would be awesome

Thanks,

Daniel

Jay351

The engine is trying to tell you somthing..

It dosnt like to run cold

b18vteceg

hahah yes thank you....but there is a reason is doesnt like to run cold....but i can't figure out what it is

possible cold start injector failure?

or is that only for start up and nothin else?

gilby4runner

doesn't it use the cold start injector until the motor reaches a certain temp? If that is so then that could be your issue

b18vteceg

hmmmm maybe ill try swappin that....couldnt hurt to try.....

Gonzo4Runner

Make sure that the cold start injector is firing. It is located on the passenger side of the upper intake plenum. Also did you hookup the water temp sensor connectors on the back of the intake manifold?

b18vteceg

ya it's all hooked up...like i said....it ran fine for awhile and then just decided to run like ☺☺☺☺....only when cold....whats the process for checkin it's firing? back probe the injector plug?

crazyyota

I think it actually only uses it for a very short time to get it started... not certain though.