Question about 1999 Pontiac Grand Am GT
Will surge as much as 1000 RPM's when in Neutral and pressing gas to between 3000 and 4000 RPM's. Stalls at a stop inermittantly. When car is accellerating the fuel connection is fine. When you attempt to maintain a speed (not accelerating or decellerating) the engine shudders and shakes. 1999 pontiac grand am gt 3400 cc turbo mpfi runs a little ruff, engine surges at 3800 rpms. just started no loose connections or vaccum lines. car pulls unitl 3800 rpm mark and then just surges. Thought it could be fule pump?
Yes it could be. have fuel pump pressure tested, fuel pump pressure should be. (key on engine off) 1999 to 2000--with egr--41 to 47 psi without egr--52 to 58 psi,
Posted on Sep 13, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
it is your idler pulley. get it from dealer comes with bracket, just use pulley off bracket. take your belt off and your idler pulley is lower right hand side(facing your engine). 15mm bolt, replace pulley and reinstall your belt. it;s a common problem on trailblazers
Posted on May 05, 2009
SOURCE: Engine shudders at 35-40.
Appreciate the direct "Ask Me".
Initially, what comes to mind is probable faulty universal joints (U-joint), actually two of them and/or missing retainer clips. They would be coupling the transmission to the propeller shaft and then to the differential. The power train is nearly perfectly balance system and any missing needle bearing on any of the four ends of the U-joint wold cause a slight wobble on a particular speed. To check, the vehicle must be lifted and the propeller shaft yanked. There must be no noticeable play or slack.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards. Thank you for using FixYa.
Posted on Sep 05, 2008
No! Don't even try it!!!! The wiring harnesses and the computers are all different! Besides, the pushrod motor is vastly inferior in longevity. Change the oil and the SOCH motor will last a LONG time... the pushrod motor will wear out after about 120,000 miles. Seen enough of them to know!
Posted on Jul 21, 2010
No check engine light? Have to guess, you might need to replace the plug wires, it could be a clogged fuel filter/regulator, or possibly the fuel pump.
Posted on Feb 10, 2011
Tips for a great answer:
Mar 18, 2016 | Suzuki Cars & Trucks
Feb 28, 2015 | Cars & Trucks
Jul 30, 2011 | Honda Accord Cars & Trucks
Feb 12, 2011 | 1988 Mitsubishi Galant
Feb 07, 2010 | Honda CR-V Cars & Trucks
Sep 18, 2009 | 2005 Infiniti G35
Sep 03, 2009 | 2004 Hyundai Elantra
Mar 09, 2009 | 1998 Pontiac Grand Am
Dec 20, 2008 | 1993 Ford Probe
1,608 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: