1997 GMC Safari Starting problems

Tiny
RFLIP1
  • MEMBER
  • 1997 GMC SAFARI
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 240,000 MILES
WHEN MY 6 CYL. 1997 SITS FOR A LONG TIME IT IS HARD TO START. IT FIRES BUT WONT KEEP GOING. IT WILL USUALLY START AFTER SEVERAL ATTEMPTS BUT FAILED ALL TOGETHER TODAY. I SHOT A SMALL AMOUNT OF STARTING FLUID INTO THE FILTER AND IT STARTED LIKE BRAND NEW. IT SEEMS TO BE OK ONCE IT HEATS UP. I HAD THIS SAME PROBLEM WHEN THE VAN WAS ONE MONTH OLD AND THE DEALER SAID THEY HAD TO CHANGE SOME RELAY THAT GIVES THE ENGINE A SHOT OF GAS TO GET IT STARTED? IS THERE A RELAY THAT PRIMES THE ENGINE? I REPLACED THE FUEL PUMP AND FILTER ABOUT 40,000 MILES AGO.
THANKS

updated 5/4/09

You suggested that I turn the key off & on a few times to see if the prime shot would be better. I had already done that and sometimes it would seem to help & other times the car would still not start. It would pop but not start unless I gave it a shot of either. Is there any type of test I can run? I am pretty good with cars and could try anything suggested.
Do you
have the same problem?
Yes
No
Thursday, April 16th, 2009 AT 10:15 PM

7 Replies

Tiny
JAMES W.
  • MEMBER
The "prime shot" when the key hits on is only 1 to 2 seconds long. This prime uses the same relay that's used for regular pump running. The length of "prime is controlled by the ECM and is non-adjustable. As components get older and a little worn, ie. Injector seats, fuel regulator valve seat, and pump check valve, the short shot isn't long enough.
Try a little experiment. Turn the key on/off, on/off 2 or 3 times before you hit start and see what happens. This should give the engine a little "extra" prime. Let me know what you find.
Was this
answer
helpful?
Yes
No
Thursday, April 16th, 2009 AT 10:47 PM
Tiny
RFLIP1
  • MEMBER
I already knew about the prime shot and turning the key on and off. I tried it a few more cycles and I don't think it helped any. Are there some tests I can make or a part I should try changing?
Was this
answer
helpful?
Yes
No
Sunday, May 17th, 2009 AT 8:10 PM
Tiny
LOUIE90745
  • MEMBER
Was this ever resolved? I'm experiencing the same issues.
Was this
answer
helpful?
Yes
No
Monday, September 21st, 2009 AT 3:43 PM
Tiny
RFLIP1
  • MEMBER
I TALKEDTO A FEW GUYS AROUND HERE AND THEY TOLD ME TO FIRST THING--CHECK THE FUEL PUMP PRESSURE. AUTO ZONE GAVE ME A TESTER AND THE THE PRESSURE WAS WAY BELOW STANDARD. REPLACED THE FUEL PUMP AND STARTS LIKE NEW.
Was this
answer
helpful?
Yes
No
Monday, September 21st, 2009 AT 7:57 PM
Tiny
LOUIE90745
  • MEMBER
Thanks. That will be the first thing I check.
Was this
answer
helpful?
Yes
No
Monday, September 21st, 2009 AT 8:02 PM
Tiny
RFLIP1
  • MEMBER
IF YOU DON'T HAVE OVER 60# WHEN YOU TURN THE KEY ON--THE MOTOR WONT START. IT TAKES 60# TO PRIME THE ENGINE FOR A COLD START.
Was this
answer
helpful?
Yes
No
Tuesday, September 22nd, 2009 AT 10:07 AM
Tiny
JACK42
  • MEMBER
Definitly sounds like a weak fuel pump. With tester on it, see how fast it bleeds pressure off after the key is turned off. If pressure drops pump is most likely bad
Was this
answer
helpful?
Yes
No
Tuesday, September 22nd, 2009 AT 1:50 PM

Please login or register to post a reply.

Recommended Guides