1995 P30 backfiring thru intake when hot
Hi, wondering if anyone has had a similar problem like this: 1995 southwind 33 ft P30 7.4L TBI with Banks exhaust. 73k miles. Rv gets used alot. Every 3 weeks or so. Starts loosing power and p...
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gswcgi wrote:
Had the same problem with a 1985 P30, 454. The heat from the manifold fried the spark plug wires and rotor about very 6,000 miles. Constantly replaced them to solve the problem. Also had massive fuel lock issues whenever the engine got hot. Had to add an additional fuel pump right in front of the fuel tank. Finally got tired of all of the P30 issues I got rid of the nightmare!
Sorry you had trouble with your P30. Suggesting the OP sell it for something else as the result of a plug wire failure probably isn't a great help, however.
I drove my new-to-me '84 P30 all summer without any vapor lock issues. I was worried about it based on everything I've read but my fears were unfounded. I can see a spot on my frame rail back by the tank where someone had installed an external pump at some point, but it must have failed and had been removed. Mine doesn't have cab A/C which can really add to under hood heat.
With the heat shields in place an proper wire routing, there shouldn't be any trouble with the wires - at least not in 6,000 miles. People talk about how close the wires and brake lines are to the manifolds, but they're no worse than the 2500 chassis trucks of the day which were very reliable.
