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I have a1994 motor home with a 460 ford engine in it It ...

Sent to Car Experts February 24, 2006 5:42 p.m.

I have a1994 motor home with a 460 ford engine in it It has 100,000 miles and was missing and running rough so I had a tune up done with new plugs wires distributer parts and all. It still was missing so I had egr switch replaced. No help. I had engine vacum machine put on it to remove all carbon and buildup from motor and injecters and it still runs anf idles,rough. What am I missing?

Optional Information:
1994 Ford e350 460

Already Tried:
Tune up with new wires etc, new egr switch, machine to remove all carbon and deposites from the motor and injecters.

Customer (name blocked for privacy)

Status: Closed Value: $10

Answer
February 24, 2006 5:47 p.m. (5 minutes and 11 seconds later)

ACCEPTED

The first two things I would do are check for vacuum leaks(hoses and intake manifold gaskets)and then perform a compression test and an idle vacuum test.On the idle vacuum test you will be looking to see if the vacuum gauge needle is bouncing rapidly or drops every so often a good bit.Compression should be compared across all cylinders if you do the test and post the numbers I can then form an opinion.

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