Having problems with your 1999 GMC Suburban ?

I have a 99 suburban that has 203,000 miles. It has developed a problem of taking a while to start. I have replaced fuel pump twice, the latest was about 3-4 years back. I have not checked pressures but fuel pump does run and then cut off when starting up. It will start well after I shut it off and restart. It has no problem accelerating after it starts( seems to be getting plenty of fuel). It does seem that it coast an unusually long time when letting off the gas. I also get a slight flutter in

Posted / edited by AnonymousUser on : 08-08-2022

Answers :

I believe you have a fuel regulator weak or dirty injectors.
\015\012Try turning the key to the "on" position ( do not try and start) wait until fuel pump stops running (3-5 seconds or so ), turn the key off and immediatly repeat for 3 cycles. On the 4th key rotation, start the vehicle. Does it seem to start up faster?
\015\012If so, the regulator is weak, however, the fuel pump does have a check valve in it to prevent fuel from leaking back into the pump and maintain line pressure.
\015\012Try the diagnostic proceedure above first and we can go from there.
\015\012Good luck, let me know.
\015\012Regards,
Repair Help & Product Troubleshooting for 1999 GMC Suburban

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