Okay folks, I don't usually ask for help here but I have reached the limit of my knowledge.
I have a 1971 142E (not important) with a 2.3 liter B230FT (from a 1993 940) M46 trans swap.
Modifications:
- iPD turbo cam
- TD04-19T ← this is new (still need to truly break it in, boost is set super low)
- Larger intercooler
- Upgraded fuel injectors (newer Bosch design for improved atomization) and fuel pump (high flowing).
- Tuning chip (not the stage 3 chip, where you need the “big greens” and 3 inch MAF)
-Cone filter (brand new)
- 3'' down pipe (running a straight pipe at the moment, haven't gotten to the exhaust yet).
Replaced/Cleaned:
- Distributor cap and rotor
- New oil separation box and all associated hoses.
- MAF cleaned
- New plugs
- Replaced almost every hose in the car
- Throttle body cleaned
- Reset the ECU, more times than I can count.
Diagnostics:
- Smoke test (smoke leak from the throttle body spring and base of dipstick)
- Boost leak test (I only get air from the dip stick, when I pull the dipstick and plug the hole I don't hear air leaking form any other location. When I release my finger from the dipstick a whoosh of air comes out.
My car starts without any issues, idles fine (wideband reads 14.1- 14.5), and feels great when accelerating, BUT when I abruptly take my foot off the gas from acceleration the engine almost stalls, or completely stalls. The car idles fine, it drives so strong I just cannot figure out why it keeps stalling. The next part to be replaced is the “idle air valve.” I feel like I keep replacing parts but I get no closer to solving the problem. My love for this car is starting to turn into resentment.
Any suggestions would be appreciated.
I have a 1971 142E (not important) with a 2.3 liter B230FT (from a 1993 940) M46 trans swap.
Modifications:
- iPD turbo cam
- TD04-19T ← this is new (still need to truly break it in, boost is set super low)
- Larger intercooler
- Upgraded fuel injectors (newer Bosch design for improved atomization) and fuel pump (high flowing).
- Tuning chip (not the stage 3 chip, where you need the “big greens” and 3 inch MAF)
-Cone filter (brand new)
- 3'' down pipe (running a straight pipe at the moment, haven't gotten to the exhaust yet).
Replaced/Cleaned:
- Distributor cap and rotor
- New oil separation box and all associated hoses.
- MAF cleaned
- New plugs
- Replaced almost every hose in the car
- Throttle body cleaned
- Reset the ECU, more times than I can count.
Diagnostics:
- Smoke test (smoke leak from the throttle body spring and base of dipstick)
- Boost leak test (I only get air from the dip stick, when I pull the dipstick and plug the hole I don't hear air leaking form any other location. When I release my finger from the dipstick a whoosh of air comes out.
My car starts without any issues, idles fine (wideband reads 14.1- 14.5), and feels great when accelerating, BUT when I abruptly take my foot off the gas from acceleration the engine almost stalls, or completely stalls. The car idles fine, it drives so strong I just cannot figure out why it keeps stalling. The next part to be replaced is the “idle air valve.” I feel like I keep replacing parts but I get no closer to solving the problem. My love for this car is starting to turn into resentment.
Any suggestions would be appreciated.