L98 shakes and died when warm
Thread Starter
Junior Member
Joined: Feb 2005
Posts: 49
Likes: 0
Car: GTA 89
Engine: L98
Transmission: TH700
Axle/Gears: BW 9 bolt
L98 shakes and died when warm
Hi guys
I am fighting with my 89 L98 Trans Am. Few days ago I have changed valve seals. As you know after that I have to set the valve lash. I did it (with 1/4 turn after zero lash) Car runs but have slow throttle response and low power overall. So yesterday I decided to go another 1/4 turn. Engine runs better and has more power. But...after 30miles when engine gets full warm temperature problem appeared. When I stood on red light Engine shaking strong (500-3000rpm) sometimes dies and sometimes get high idle (2000rpm for example)
I've parked the car and returned when cold. Start the engine and drive 15miles without any problems. Could this caused by too tight valves?
regards
I am fighting with my 89 L98 Trans Am. Few days ago I have changed valve seals. As you know after that I have to set the valve lash. I did it (with 1/4 turn after zero lash) Car runs but have slow throttle response and low power overall. So yesterday I decided to go another 1/4 turn. Engine runs better and has more power. But...after 30miles when engine gets full warm temperature problem appeared. When I stood on red light Engine shaking strong (500-3000rpm) sometimes dies and sometimes get high idle (2000rpm for example)
I've parked the car and returned when cold. Start the engine and drive 15miles without any problems. Could this caused by too tight valves?
regards
Joined: Oct 2001
Posts: 12,214
Likes: 1,140
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: L98 shakes and died when warm
Do you have stock injs ?
Joined: Sep 2005
Posts: 27,871
Likes: 2,430
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: L98 shakes and died when warm
Sounds like you have valves that are too tight.
Adjust them with the engine running.
No substitutes.
Adjust them with the engine running.
No substitutes.
Thread
Thread Starter
Forum
Replies
Last Post
Abubaca
Tech / General Engine
28
Dec 16, 2020 01:02 PM