North American Turbocoupe Organization



detonation or something else ( fixed )
dpmeeks Offline
Member
#1
my car has been down all week. i have been trying to figure out why i parked it and went out the next morning and it wouldnt hardly run. Now, its running which feels like on two cyl's.

I have replaced the- plugs, wires, cap, rotor, PIP, TFI, FPR, fuel filter, & timing belt. Still running like crap. I pulled the valve cover off and looked at the cam and valves and springs and everything looks good. The timing marks and everything line up perfect when i put it on TDC.

Heres my question, when i can get it running it runs very rough, i have to keep my foot on the pedal to keep it running and when i give it gas i hear what i think is detonation, but louder than you would hear from bad gas. My next thing, i have a fuel press gauge hooked up and it wont get over 25psi while the engine is running. If its running that lean would detonation be that loud ?? or is it something else ??? im planning on doing a compression test next to make sure everything is ok internal...
Silver- 87, 5-speed,
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Chas K 88 Offline
Member
#2
25 PSI isn't very much, I think we should be at ~40 PSI with the vacuum line off. Perhaps that is your problem. Good luck with it, other more knowledgeable folks will chime in soon. Wink
Chas K.
88 T-bird, 5 speed, Wiseco pistons, Gillis valve, 255LPH fuel pump, CD, tripminder, RR cam, K&N, 140 MPH speedo conversion (thanks Jeff K).
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Pete D Offline
Administrator
#3
I been talking to dp and he is only getting 25 psi compression in the #1 & 2 cylinders so it looks like that end of the car has a blown head gasket. It also has some kind of fuel issue.
Pete Dunham


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dpmeeks Offline
Member
#4
does anyone have a grenade for sale ???

Ill sell my 140 speedo for 800.00 and the car comes with the deal for free Smile

does anyone know the size of the 12pt. socket u have to use to remove the head bolts ???
Silver- 87, 5-speed,
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Pete D Offline
Administrator
#5
13mm, 12 point

I know you been through h..l with that thing. Go easy with the grenade Big Grin
Pete Dunham


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dpmeeks Offline
Member
#6
lol thanks pete.. im gonna put the HG on it.. pray for me ..after the HG repair, IF everything else is ok she'll be like a new TC mechanically. Ive replaced just about everything else on the car LOL
Silver- 87, 5-speed,
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Ryan H Offline
Posting Freak
#7
dp, sounds like what I went through with my 2nd TC before just selling it. I spend over 2 grand on it getting it to drive and found that the head cracked. Check in between the intake/exhaust valves when you pull it for hairline cracks. Much luck to you and let me know if you need a head, the local JY has plenty of N/A heads here if worse comes to worst. Smile
'88 TC Smile Walbro 255HP, Stinger FMIC, PIT BOV, Pro 5.0, Kirban, RR cam, FRPP strut tower brace, T3
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dpmeeks Offline
Member
#8
thanks ryan i really appreciate it...
Silver- 87, 5-speed,
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dpmeeks Offline
Member
#9
well.. got the headgasket on and shes purring like a kitten again.. thanks for everyones help !!!
Silver- 87, 5-speed,
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The Shredder Offline
Member
#10
Congratulations dpmeeks. I'm gled you have your car back. It should last a good long time now!

Prayer works, huh? :-)
88TC blue/blue, auto, loaded except leather, bone stock, 127K mi. - back in the TC game!
88TC white, converted 5 spd, K&N filter, Manual Gillis BV, 189K mi. SOLD :-(
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