need help with TGP - no run when warm

Started by patgizz, May 05, 2008, 11:47:06 AM

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patgizz

May 05, 2008, 11:47:06 AM
this developed yesterday morning - on my way home after the car sat all night it was down on power.  i installed new plugs/wires(r42ts delco plugs @.045"/accel 8mm spiral core wires) and took it for a test ride .then as i went around the block it developed into trying to cut out when i hit a certain throttle position or rpm.  when i got home it stalled.  when warm it will not or barely restart.  when cold it will start and idle fine,  but when i hit the gas at all it will cut out immediately.  even a slight tap on the pedal.

i tested fuel pressure last night and thought i found the culprit and put in a new walbro pump,  and tested again to no pressure only to find my tester bad.  new tester shows 50psi @ cranking and when the pump turns off it stays at a steady 41psi without draining down so it appears the regulator is good.  while warmed up and not restarting,  the car restarted immediately on starting fluid.

the car has run great since wednesday and i've put about 500 miles on it so far. 
Red 1990 5 speed TGP:
HM282, Spec Stage 3 clutch, FFP Pulley + Dogbones, JeffM Crossover, 8mm Accel Race wires, AC Delete, PM3 Delete, Magnaflow cat, 34MM front sway bar w/ poly bushings, Drilled/Slotted rotors, KYB's, F+R STB's, and a bunch of other crap i can't remember.

TGed

#1
May 05, 2008, 03:00:08 PM
You make sure the relay is not at fault?  Change the fuel filter (good maintenance if anything) ?  Wires to the pump in good shape?  No cuts or splices... corrosion.
http://www.tgpforums.com/index.php/topic,5214.msg38936.html#new

-Don't go around saying the world owes you a living; the world owes you nothing; it was here first.-

-Assume nothing, question everything.-

patgizz

#2
May 11, 2008, 03:54:04 PM
turned out i had 3 bad injectors.
Red 1990 5 speed TGP:
HM282, Spec Stage 3 clutch, FFP Pulley + Dogbones, JeffM Crossover, 8mm Accel Race wires, AC Delete, PM3 Delete, Magnaflow cat, 34MM front sway bar w/ poly bushings, Drilled/Slotted rotors, KYB's, F+R STB's, and a bunch of other crap i can't remember.

grinders_18

#3
May 11, 2008, 04:01:08 PM
Good to know you figured it out!

This radio station was renamed Krenzy in honor of the last American hero to whom speed means freedom of the soul. The question is not when he's gonna stop, but who is gonna stop him.

cobracmdr

#4
May 12, 2008, 08:31:40 AM
Quote from: patgizz on May 11, 2008, 03:54:04 PM
turned out i had 3 bad injectors.

That will do it  :laugh:

1989 Turbo Grand Prix - missed very much!!!!
2010 Camaro 2SS/RS LS3 M6 12.01 @117 mph - Inferno Orange Metallic, long tubes, x pipe, Cat back, all 3" pipe 321 SS, vararam intake, LC-1, diy tune
01 Grand Prix GTP - 3.4 pulley, plog, k&n drop in, u-bend & resonator delete, tuned
03 Suzuki SV650N - zx10 shock, racetech springs/emulators, streetfighter

patgizz

#5
May 12, 2008, 03:46:42 PM
Quote from: cobracmdr on May 12, 2008, 08:31:40 AM
Quote from: patgizz on May 11, 2008, 03:54:04 PM
turned out i had 3 bad injectors.

That will do it  :laugh:

funny thing is it ran awesome wednesday thru saturday,  then sunday morning got sluggish, and sunday afternoon started stalling out.

ohmed all the injectors:

12.5
12.5
12.6
10.5
8.6
2.5

3 fine, 1 on the way, 1 almost there, and 1 completely FUBAR
Red 1990 5 speed TGP:
HM282, Spec Stage 3 clutch, FFP Pulley + Dogbones, JeffM Crossover, 8mm Accel Race wires, AC Delete, PM3 Delete, Magnaflow cat, 34MM front sway bar w/ poly bushings, Drilled/Slotted rotors, KYB's, F+R STB's, and a bunch of other crap i can't remember.
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