Hello--
I am posting for a friend I am trying to help, so bear with me if I get something wrong.
He has a '89 d50 with the carb'd 2.0 w/ auto. The truck does not want to idle smoothly -- bucking and shaking -- and revvs slower than molasses until the motor is warm. You could literally hold the throttle wide open while its cold and it would take a solid 5 seconds to rev up to a decently high rpm. I only let the truck get mildly warm before telling him to shut it off, but before he did, I gave it a few solid revs and it seemed to be getting better.
Basically the parts cannon has been blasted at this truck -- new dizzy, fuel filter, pump, wires, plugs, coil, and a weber 32/36 kit. I was asked to help after most the parts were installed and was there to help with the 32/36 install.
Seeing as all the emissions crap has now been disabled, the spark system is essentially new, and the fuel system has been gone through, I really dont know what else to check.
I dont know a bunch about these trucks. My next thing to check would be valve tolerances but I am unsure if his had the adjustable lifters or the HLA's. I know the 2nd gen(?) trucks had hydraulic lash adjusters, but I am unsure what gen his truck is.
My next concern is either a timing belt issue or compression. His timing was set a bit high, but that shouldnt affect how it revs based on the motor temp. It does burn oil while idling, which makes me think the motor is tired...
Could the torque converter be causing issues?
Any help would be really appreciated. Hes about to burn the truck to the ground with the issues hes having with it haha
Bookmarks