truck wants to shut down around 6 psi. boost Any idea??

[1madgumby]

I get to around 6 psi. of boost with it & it seems like it is dumping way to much fuel in it, wants to stall. I have to put it nutural for A second or two. then rev it up to clear it out. Idles fine & runs fine up to that 6 psi. point. My guess it might be the MAP or the Fuel Pressure Reg. What you you all think?

Thanks..

 

[sly dvl]

Re: truck wants to shut down around 6 psi. boost Any idea??

Can you get more then 6 psi of boost out of it? If not, then I agree with Dave; sounds like your Cat is plugged.

 

[1madgumby]

Re: truck wants to shut down around 6 psi. boost Any idea??

there is no cat. on it..

 

[JSM]

Re: truck wants to shut down around 6 psi. boost Any idea??

Bad sensor, bad tune.

 

[sly dvl]

Re: truck wants to shut down around 6 psi. boost Any idea??

Well then, guess we can rule the cat out as a potential problem. I'd be checking you fuel pressure when the problem occurs, NOT AT IDLE. It could be as simple as a restricted fuel filter.
MAP sensor is a possibility too. Mkae sure all you vac. lines are intact.

 

[Sy-1177]

Re: truck wants to shut down around 6 psi. boost Any idea??

So I guess this means its running then?? Thanks for letting me know dick! :roll: Its funny you have this issue, mine is doing the exact same thing! I'm thinking either fuel pump or injectors in my case.

 

[Ian Turgeon]

Re: truck wants to shut down around 6 psi. boost Any idea??

First I'd check is Fuel pressure, I kinked my afpr vacuum line once and it acted the same. If it's cutting out like it hit the fuel cut, that'd be my guess.