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engine bogs when you give it gas


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lwp102
New User

Jul 19, 2010, 7:02 AM

Post #1 of 8 (2452 views)
engine bogs when you give it gas Sign In

i have a 2001 gmc safari van 4.3 170000 miles. when i start it,idles a little rough,but as soon as i try to give it gas,it bogs down and cuts off,and takes a while before i can get it restarted.i cdan get up to about 1200 rpm and thats it ,put a new fuel pump in but that doesnt help,any other things i might b able to try ? or what might b causing this.

thanks,
Lloyd


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 19, 2010, 7:43 AM

Post #2 of 8 (2443 views)
Re: engine bogs when you give it gas Sign In

What is the fuel pressure when this happens?



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



lwp102
New User

Jul 19, 2010, 4:22 PM

Post #3 of 8 (2434 views)
Re: engine bogs when you give it gas Sign In

fuel pressure is,
engine off key on 55
idle 58


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jul 19, 2010, 4:26 PM

Post #4 of 8 (2432 views)
Re: engine bogs when you give it gas Sign In

That is your problem. That is too low. The spec minimum is 60 PSI. Some of these won't even start at 55PSI. Probably a bad fuel pump but check the dead head pressure to see if it's capable of spiking much higher. If you didn't use a Delco pump, you may have to change it again. You may also have pinched one of the hoses putting the tank back up.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Jul 19, 2010, 4:28 PM)


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Jul 19, 2010, 7:11 PM

Post #5 of 8 (2425 views)
Re: engine bogs when you give it gas Sign In

Lloyd; Agree with HT. Delco only!! You did replace the fuel filter, right? <smile>
Loren
SW Washington


Sidom
Veteran / Moderator
Sidom profile image

Jul 19, 2010, 7:24 PM

Post #6 of 8 (2423 views)
Re: engine bogs when you give it gas Sign In

The pressure is a tad low but since you have the same problem as before you may want to take a vacuum reading at idle & high rpm. If the vacuum drops to almost nothing when revving, you may have a restricted exhaust system. You could break the pipe loose at the manifold or pop out the O2s and see how it runs.......

Did you pull the codes to see if there were any stored codes............


lwp102
New User

Aug 27, 2010, 7:00 PM

Post #7 of 8 (2351 views)
Re: engine bogs when you give it gas Sign In

hey sidom,sry i didnt get bk earlier but you were right .it was a clogged converter,thnx guys for all your help,you guys are awesome, thnx a ton.

Lloyd


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 27, 2010, 7:03 PM

Post #8 of 8 (2347 views)
Re: engine bogs when you give it gas Sign In

You da man Sidom






~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



(This post was edited by Hammer Time on Aug 27, 2010, 7:11 PM)






 
 
 






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