tugalo
NAXJA Forum User
- Location
- easley, sc
88 MJ, 4.0, B/A10. I have a new short block installed and have developed a most irritating problem.
Initially the truck starts and runs strong , then when the temp comes up and it is in the transition phase from open to closed loop, it dies when I come to a stop. Once it dies, it does not want to restart with the key; but if I am in a place where I can roll start it, it fires up immediately.
I have swapped out the MAP and IAC from my stash, cleaned the throttle body, checked for vacuum leaks,disconnected the O2 sensor, and re-seated all the relays and connectors with no change in symptoms. My C101 has been removed.
If I feather the throttle when coming up on a stop, and keep the RPM up around 1200-1500, it will stay running.
the last time this happened, I checked the spark at the coil and had a strong spark. I have 4 hole injectors in it and the plugs are running a light gray color. looks a little lean to me.
The strange thing is, once this happens and I get it re-started, it runs fine the rest of the day. I am leaning toward a CPS going bad. Any ideas or suggestions?
Initially the truck starts and runs strong , then when the temp comes up and it is in the transition phase from open to closed loop, it dies when I come to a stop. Once it dies, it does not want to restart with the key; but if I am in a place where I can roll start it, it fires up immediately.
I have swapped out the MAP and IAC from my stash, cleaned the throttle body, checked for vacuum leaks,disconnected the O2 sensor, and re-seated all the relays and connectors with no change in symptoms. My C101 has been removed.
If I feather the throttle when coming up on a stop, and keep the RPM up around 1200-1500, it will stay running.
the last time this happened, I checked the spark at the coil and had a strong spark. I have 4 hole injectors in it and the plugs are running a light gray color. looks a little lean to me.
The strange thing is, once this happens and I get it re-started, it runs fine the rest of the day. I am leaning toward a CPS going bad. Any ideas or suggestions?