Lately my 89 RS 2.8l has been having hot start problems. My car runs great when i first start it up in the morning, and starts up/runs great after the original start if i leave it off for 30 minutes or so. If i restart my car before within the 30 minutes of being off it runs horrible. It chugs and misses, and usually stalls out the first time i apply the brakes. Also my car runs far better in cold weather than in hot weather. Anyone know what i could do to correct this problem??

 

Make sure your not over heating. You mind want to try chaning your thermostat to like a 160 degree instead of the stop 195.

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Josh
1989 Firebird
Working the 2.8 to 3.4 swap with a 5 speed.
Kills: 2000 Silverado V6, 1995 v6 mustang, 1994 rodeo v6, 2001 Ford Sport trac, 1992 honda prelude riced out

Losses: 89 GTA, 95 Z28, 90 Camaro 305 TBI with mods

 

Is it very warm in your state? I'm wondering if you have a problem with something regarding open/closed loop... like, a bad oxygen sensor (or melted oxygen sensor wire). Altho, closed loop shouldn't occur right after starting the motor...

What if you start the car, let it run okay for 5 minutes, then turn it off- will it start back up okay again?


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-Tom P (Hot rodded 1986 Firebird 2.8l)

 

I replaced the 160 degree thermostat about 2 months ago with a 195 because the 160 was running far to cold.

 

I live in Ohio, so its not really that warm here.
If i let it run for 5 mins then turn it off, it usually runs alright.
the car doesnt stall out while in idle, it stalls when i brake to come to a complete stop.