Running rough

[tln708726]

I just bought a 1990 vw cab conv with 78,000 miles the car is in good shape. On the way home it was running rough so I replaced, plugs, plug wires, cap and still did not help. I could not fund a vacume leak and air gilt was changed. So I took a chance and got a new mass air flow, still did not help. I'm out of ideas? Anyone?

[stronglikebull]

specifically, how was it running rough?

[CajunSpike]

First suspects are weak fuel pressure and a torn rubber part/hose/line letting air in...or even an air leak thru the brass idle air screw on the back side of the throttle body.

does it run better hot? cold? look at the exhaust while its running. blue color? black color?

need more clues.

[tln708726]

gave up and took it to the shop and the problem was both fuel pumps. Now car runs better but there are a lot of small things that need fixed. When driving it home the oil lite would come on at a stop but go off when driving, Radiator has a small leak, both axels need replased.

[briano1234]

gave up and took it to the shop and the problem was both fuel pumps. Now car runs better but there are a lot of small things that need fixed. When driving it home the oil lite would come on at a stop but go off when driving, Radiator has a small leak, both axels need replased.

Cheap oil filter say away from Generics ie: FRAM.
Low oil vis, get 20w50

Replace the radiator, you will be time and monies ahead Also take time to flush and back flush the cooling and heating system, and change the t-stat drill the burb hole.

How to flush: http://volkswagenownersclub.com/vw/s...-your-radiator

Buy new axles from germanautoparts.com
Get to know www.cabby-info.com really well
Buy a Bentley.

[tln708726]

i changed the oil and put in 20-50 and that fixed it, just sucks the person i got it from just put changed the oil and put a good filter on. Oh well, one more thing down. Next week is new axels and strurts. I already got the axels but have not found struts yet. My wifes $2000 car is up to $3,000 but she loves it. More than her BMW z3.