Trouble shooting 2F (1 Viewer)

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

Joined
Mar 16, 2003
Threads
201
Messages
615
Due to rust thru of old tube, I just replaced the EGR cooler to EGR valve tube on my FJ60 (86). Has certainly taken care of the "popping" and backfire I had prior to warming up.

Now, new problem... won't run well unless fully choked. Before replacement , truck ran very well. Truck starts easily, but just runs rough and seems to be on the verge of stalling unless I keep full choke.

Suspect vacumn problem?

I have the emission control repair manual, which I will start trouble shooting with this weekend. In the meanwhile, can someone confirm for me whether or not the high altitude compensation (HAC) valve, always draws air from the bottom tube open to atmospheric (ambient) air under all condtions. It seems to on mine, but the truck does seem to smooth out a bit when I plug that particular port. From the manual it doesn't make sense to me....

Thanks and cheers

Dave
 
The HAC would not cause problems with the cruiser not idling. I would check your fuses..maybe the engine fuse. Also the EGR valve might be stuck open which would cause it not to run good.
 
Last edited:
maybe with all that rust damage it was sucking in clean air and the carb was adjusted for that. so maybe now its running to lean since you have to have the choke out. maybe just rich it up some?
 
Thanks...

Appreciate all the hints...will post back when resolved!

Cheers, and Keep on Cruising!

Dave
 

Users who are viewing this thread

Back
Top Bottom