Engine stubbles at idle speed
The MH in my signature has become Ihard to start and falls flat when I give it the gas. The problem seams to be progressing. Changed fuel filter before trip, ran can of seaform. Still does it when it'...
Forum Discussion
rjxj wrote:. After looking at that video again on checking fuel pressure on a tbi my son noticed that it was a HF kit I call HF after striking out at oriellys they said they had them but when I looked at it it did not have the adaptor. I showed the mgr the picture in the video and he told me they sold them 4 years ago. How would I make sure there is voltage back there? Would the tank have to be dropped to do this?
When checking the fuel pressure it could be low but doesn't always mean it's the pump. That's just one step of the trouble shooting. As you are doing, be sure it's getting enough voltage back there. If low it could be any number of things from corrosion to a bad switch relay etc. It seems you would also have lower voltage output at idle from the alternator which could make things even worse. On an older vehicle you could have corrosion growing far back up a wire under the insulation.
Just like an o2 for example. It doesn't mean it's absolutely the o2 sensor, it can be anything in that circuit. I have fixed a couple heated o2 sensor codes by simply removing and reinserting the fuse in the power center. The ecm picked up the resistance of the dirty oxidized fuse blades.
