- Joined
- Aug 26, 2008
- Messages
- 1,094
- Reaction score
- 13
- Points
- 0
- Vehicle Year
- 1994, 2001
- Make / Model
- 1994 Ford Bronc
- Engine Size
- 5.8v8
- Transmission
- Automatic
- My credo
- Failing is easy. Everyone can do it.
Okay. This is getting rather annoying. As much as I like driving the wife's Beetle? I need to get this Bronco II back in good shape.
Intake leak cured. Small amounts of white smoke when the truck starts up after not being run for a few days. Figure it's the usual condensation burning off.
Issues: Starts HARD! Spins rather quick and seems to want to 'catch'. After several tries it finally starts--and then stalls out like the idle dropped to zero.
Does this a few times and finally will start and run. Here's the rub: The RPM on a stone cold start---about 750-800 RPM. It's acting like the computer is commanding the system to enter "closed" loop upon start up and not giving the engine a chance to warm up.
The fuel pressure and such as been tested over and over and over. It's fine. Spark seems to be strong. (jumps a very large arc when tested)
The fun part? After the engine finally warms up? Runs pretty good! I ran it on a 30 mile round trip and worked the day lights out of it. Goosed it several times, 0-60 heavy throttle. Once it's there, it's great.
This truck has always had an issue with cold starts. Leave it alone for a day or two and it used to start---stall---start and continue running. Seems what ever is causing that issue? Has worsened.
I'm planning on doing a full tune up on it in the near future. I've inspected the plugs, wires are in fair shape, cap and rotor pulled and inspected. Fairly good shape.
It's just like the truck 'thinks' it's already warmed up and in closed loop.
Does anyone think the coolant temp sensor for the computer may have tossed it? If it's reporting the engine is at temp, or 'hot'...even when stone cold? Could it be commanding the system to run "leaner" and at the lower RPM?
Looking for some direction on this one. Due to being almost out of $$ for these projects (and needing to do the service on the wife's car...oil change and manual trans fluid change..that's not cheap for all the syn. fluid it calls for)
S-
Intake leak cured. Small amounts of white smoke when the truck starts up after not being run for a few days. Figure it's the usual condensation burning off.
Issues: Starts HARD! Spins rather quick and seems to want to 'catch'. After several tries it finally starts--and then stalls out like the idle dropped to zero.
Does this a few times and finally will start and run. Here's the rub: The RPM on a stone cold start---about 750-800 RPM. It's acting like the computer is commanding the system to enter "closed" loop upon start up and not giving the engine a chance to warm up.
The fuel pressure and such as been tested over and over and over. It's fine. Spark seems to be strong. (jumps a very large arc when tested)
The fun part? After the engine finally warms up? Runs pretty good! I ran it on a 30 mile round trip and worked the day lights out of it. Goosed it several times, 0-60 heavy throttle. Once it's there, it's great.
This truck has always had an issue with cold starts. Leave it alone for a day or two and it used to start---stall---start and continue running. Seems what ever is causing that issue? Has worsened.
I'm planning on doing a full tune up on it in the near future. I've inspected the plugs, wires are in fair shape, cap and rotor pulled and inspected. Fairly good shape.
It's just like the truck 'thinks' it's already warmed up and in closed loop.
Does anyone think the coolant temp sensor for the computer may have tossed it? If it's reporting the engine is at temp, or 'hot'...even when stone cold? Could it be commanding the system to run "leaner" and at the lower RPM?
Looking for some direction on this one. Due to being almost out of $$ for these projects (and needing to do the service on the wife's car...oil change and manual trans fluid change..that's not cheap for all the syn. fluid it calls for)
S-