Loose heads + pressure sensor issue...

can anyone help. 1972 914 I have been having problems with my cars idle after it's been running for about 25 min. The book says it's the fuel mixture and when I take it to the shop the mechanic tells me the heads were loose and the valves were tight. My question is if the heads the first time came loose and leaking oil were the gaskets still good enough to re-tighten instead of getting new ones. Every time I take it in he has to tighten up the heads and readjust the valves. He also says that the pressure sensor my be bad and he make the car run richer but within a week the same thing happens again. Has anyone had this problem and can you help.

__________________
This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: EFI Troubleshooting Document #1

[Wayne 962]

Sounds like you need a new mechanic to start. I haven't really heard of a problem with the heads being loose on these engines - I hope that he is not overtightening them each time. You cannot use a static torque method to tighten them, you have to use running torque with lubricated head studs. Actually, any time after assembly, the torque values are not terribly accurate, but that's a different story for a different day.

He should be able to measure your mixture on a CO machine, and he should also be able to test your pressure sensor for proper operation. If he can't do this, then you should probably find a mechanic who can?

- Wayne