When it was idling and revving, it was fine up until 3000. Short block and valves - He says the engine ran fine and revved right up so they don’t think anything’s wrong with the engine mechanically.
Anything that would slow the car down has been taken off. The turbo only kicks in after 3500.Įmissions have been taken care of - Means no cat and any vacuum lines that are unnecessary have been taken off and it has been checked for leaks. When they car first started getting problems, it would fire up to 3000 RPM just fine and idled as smooth as can be but after 3000, it would almost skip and not let him go above it. He ruled the turbo out because he hasn’t gotten enough RPMs to get into the turbo. The turbo spins freely and he hasn’t had enough RPMs to build boost. He doesn’t think it’s a breathing problem because there’s no cat on it and the car started out fine but got worse. The ScanMaster is just a diagnostic tool to read the computer. Updates and thanks to everyone who replied: He hasn’t tried the scope yet. If he’s running stock heads, breathing might be the problem.ĭoes it have a high lift/high duration cam? Have the push rods and springs been upgraded accoringly to allow the valves to open & close properly? If the engine has been converterd to methanol, has the ability to breath in & out been modified accordingly? Details if you would please. I’, also womdering what has been done to the heads. Many regular shops won’t have the experience to diagnose an engine like this. Try a speedshop that races their own vehicles. Perhaps a bit of work with an analyzer and a good diagnostician would be a wise investment. I’m wondering why you’re assuming the Scanmaster programming is operating properly. In addition to the failure to rev being caused by an inability to breath out or an insufficient fuel supply pressure, recognize that a failure to advance the ignition timing could also limit the ability to rev. A voltmeter won’t tel you anything about the pulses. “Checked readings on all wires with volt meter and all is fine. Not the throttle position sensor because it would fire up even with a bad throttle sensor. Pulled apart the Cam sensor and made sure it wasn’t missing any teeth.
#Buick scanmaster code#
Wasn’t the turbo because the turbo doesn’t spool up before 3500.Ĭan’t get a code off the computer (doesn’t have any).Ĭhecked readings on all wires with volt meter and all is fine. Not the engine because when it was running, it ran very smooth and had no issues, but it wouldn’t run past 3000. Compression Test : Has 190 lbs.įuel: 60 lb injectors and runs right off idle (60 lbs all the way through) Tried: Every fuse, clean gas & fuel filter, every wire (no breaks), checked sparks (spark all around), new coil pack, new 02 sensor, new cam sensor, new crank sensor, new computer, cleaned out map sensor. Problem: Car wasn’t originally revving past 3000 and now it won’t even fire up. From the bottom of my heart, I would appreciate anyone who can help him out! He’s so frustrated at this point and is forced (gasp) to drive around in his mother’s minivan while his Buick remains in the bay. Please read everything he and the mechanics have already attempted. It has a heavy duty timing chain, professionally built.
It runs meth injection and Scanmaster programming. A while ago, he bought a 1985 Buick Regal – Engine 1987 Grand National (GNX) 60 Trim turbo.
I’m praying there’s someone out there who can figure this out because no mechanic has been able to. My son has been a car fanatic for years and works hard to support his passion.
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