I got a 91 maxama v6 3000 with fuel injection and automatic trans with cruz controll.
I got a intermitent problum I cant diegnose and last shop i took it to did not find it.
Problum is when driving on freeway or even streets the moter will cut out like one pinched off gass line so I then pump gass and it will re gane power agen it dont happen all the time .
I have put in new fuel filter to start off with but it did it agen …
little hystory on car all injectors replaced some time last year , did new smog test whare gass tank is preserrised and i onlyhad like 1/4 tank or less in it , gadge dont read completly full when tank is full…
My thoughts are
#1 tank got junk in it and pick up is cloged #2 fuel check valve going bad #3 pick up bad ???
Please help or advise me whats you think it may be it kinda a hick up …
thank you
bill m
whittier ca
There are a lot of things that will cause this problem. Throttle position sensors used to do that when they wore out. Similar symptoms also happen when an O2 sensor has been contaminated. A fuel check valve seems to be ruled out.
thanks for the advice.
I think the 02 sensor is ok cos i past smog check.
how do you test the throtle position sencior ? location of it is on the throttle body housing?
The only way I know to test it is to actually check the signal out as you manually operate the throttle linkage. Yup, it’s on the throttle body. A Haynes manual should have instructions for this.