Ask Your Car Question. Car Experts Answer You ASAP.

(Not a Car Question?)

93 CUTLASS SUPREME 3.1 L .Idles ruff runs good .Some times ...

Sent to Car Experts October 3 2005 at 10:27 PM
   

93 CUTLASS SUPREME 3.1 L .Idles ruff runs good .Some times will back fire Idle only.It will back fire everytime you rev it up and as the RPM's come down at 1500 it will pop every time.It has a new timing chain and the old one looked good,intake gasket, egr , fuel regulator ,plugs, wires,many brands of fuel injector cleaner and mobile one prem.Checked for intake leaks ,runs good ;Idles like crap.125000 miles

Customer (name blocked for privacy)
Status:  Closed   Value: $10
Info Request
October 4 2005 at 12:04 AM (1 hour and 37 minutes and 8 seconds later)
         
REPLIED to Info RequestCheck Mark
Is the check engine light coming on?

If I was helpful, please click the ACCEPT
button.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2719 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
October 4 2005 at 9:01 PM (20 hours and 56 minutes and 53 seconds later)
         
Reply to Hammer Time's Post: No light anymore.When I got the car it would hardly run.The fuel regulator was dumping fuel in the vacuum lines and running out the vacuum inlet out side the butterfly valve flooding the engine .Also throttle position sensor was changed ,and the light went out .This was a year ago.I ran it again today and sprayed starting fluid all over looking for a leak .Nothing showed up .Will a fuel injector do this ?I was thinking this ,but it sounds like it will make a single popping noise (back fire I figure) one time almost every time you revue it up .But not always the same cylinder as far as I can tell.
Customer (name blocked for privacy)
Info Request
October 5 2005 at 1:00 AM (3 hours and 59 minutes and 14 seconds later)
         
I would probably to an injecter leak down test next. You will need a fuel presssure gauge and a scan tool.

If I was helpful, please click the ACCEPT
button.
Picture
Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2719 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Think you can answer this question?
Login or Become an Expert

Related Answers

 

DISCLAIMER: You acknowledge that any information you may obtain from individuals you contact through use of the JustAnswer service comes from those individuals, not from JustAnswer, and that JustAnswer is not in any way responsible for any of the information these third parties may supply. The site and services are provided "as is" with no warranty and no representations are made regarding the qualification of an Expert. Responses and comments on JustAnswer are for general information and are not intended to substitute for informed professional advice (such as medical, legal, investment or accounting) and do not establish a professional-client relationship. JustAnswer is not intended or designed to address EMERGENCY QUESTIONS which should be directed immediately by telephone or in-person to qualified professionals. Please carefully read the Terms of Service.

JustAnswer > Car Repair