HI I NEED SOME HELP IF U ARE FAMILIAR WITH 1997 GMC SAFARI AWD 4.3L
V6 IT HAS 161K MILES IT BUCKS (MISSES,STUMBLES,HOWEVER U WANT 2 PUT
IT) ESPECIALLY WHEN IT IS COLD. WHEN IT IS WARMED UP IT LESSENS AND
SOMETIMES EVEN GOES AWAY. I ONLY KNOW A LITTLE ABOUT CARS. THE
PREVIOUS OWNER REPLACED EGR, PCV, COMPLETE TUNE UP WITH AC DELCO
PARTS, & AIR FILTER. THE CHECK ENGINE LITE DOESNT COME ON WHEN IT ACTS
UP AND I CHECKED FOR ANY TROUBLE CODES THERE ARE NO CODES. THE
PREVIOUS OWNER SAID IT MIGHT BE A FAULTY INJECTOR? I DONT KNOW IF IT
IS FUEL RELATED OR WHAT, I DONT WANT 2 BE GUESSING AND THROWING PARTS
AT IT. PLEASE IF U CAN HELP ME OUT DROP ME A MESSAGE THANK YOU!

if you got the 4.3 vortec v6 and smell gas or misses alot. it is the spider
injuction . i got a 95 and had the same problem and you wouldn't get a code for
that.

transamdemon

You might look at the Throttle Position sensor.... I tended to lunch one per
year on my 95. Something about the position of the thing exposed it to the
elements.

mike larcom

are u pretty certian it is the injection? i dont smell fuel, but it does miss.
i had a blazer that needed the injection do u think the fuel diahpram is bad,
someone told me 2 ck that out? thanks!

mike larcom

Arron:
It sounds increasingly like a Throttle Position sensor.
/E


aaron shensky

Oh... have you tried running some heavy injector cleaner through it?


Eric Florack

yes i just put in some LUCAS injector cleaner yesterday. the van is running
great today since it is warm outside, but when the van is cold wow, it bucks
like crazy.

Eric Florack