Broncoman1969
New Member
I know a lot of you have put the EFI 351 truck motor in your Broncos. I am having trouble with the '93 EFI motor. It has always seemed low on power. A tune up helped some but still does not have the power I think it should have. The other day when I was driving down the road it started having what seemed like a lean backfire through the throttle body. As I nursed it back to the house I found that it would run better once I got the rpms higher. That seems backwards to what I was thinking the problem was... low fuel pressure. I decided to park it and look at it in the morning when I wasn't so upset. Anyway, in the AM it started and ran fine. Still low on power but not backfiring at all. Any ideas? Checked codes and all it showed was throttle position sensor (which I had already replaced. Old code?) and egr valve not opening. Beyond that nothing. I don't want to take it out and get stranded so basically it is stranded at the house. Any ideas? Help please. Thanks!
Karl
Karl