howdy
I recently acquired a '78 van in the proverbial "cup half full or cup half empty" shape... it was free, but without title. The body is fairly rusty, and the very very rear of the frame is starting to disintigrate. The engine runs strong intermittently, with even compression all the way around. Currently I'm having a few issues that I -think- are related to the FI, but I haven't yet ruled out the hydralic lifters to my satisfaction.
Anyhow, when the car is 'slightly' cold, ie, not been run at speed for 5-10 minutes, the thing idles =rough= a good percentage of the time. The cylinder head temperature sensor seems to check out okay, the resistor bank is fine. I figure I probably have an intake leak -somewhere-, but have yet to find it. I've been searching the google usenet archive, and tonight came across an oddity. A few people mentioned that leaky pushrod seals can cause intake leaks. (!?) I have for sure some dead pushrod seals, judging by the little drippies on the garage floor, and the slight mess under the clylinder heads. However, this just sounds dubious to me. Could leaky pushrod seals or valve covers really cause a rough idle?? Is that just voodoo BS, or reality?
talk to me!
-Matt
'75 FXE '78 VW Bus