I'm new to the forum and looking for some help with my
85 Fiero 4 cylinder Automatic.
Last summer the car stalled when either D or R was selected.
Local garage renewed distributor cap rotor plugs and leads.
Still stalled garage gave up.
Also changed auto box oil and filter.
So after this here Is the long list of parts renewed.
TPS, IAC, Coil, Thermo switch, Oxygen sensor, pick up coil
in distributor, thermostat and caps.
Charge rate ok. All vacuum pipes good. No chaffed or loose
connections. All engine earths good.
PCV valve cleaned and rattles.
EGR valve stalls warmed up engine when pressed.
Magnet in distributor ok.
Code scanner gives me no bad fault codes and reads 12 engine
static but warmed up and engine running check engine light flashes
1 second on 1 second off with scanner plugged In.
OK so here's the problem...
Start up perfect runs slightly lumpy at 1700 RPM after 4-5 minutes
sounds right all 4 cylinders sweet.
Car brings down revs after warm up to 900.
So far so good. At just over 100f on the gauge if I select either D or R
revs drop to 500 and engine nearly stalls or does stall.
Allowing the engine to reach full warm up no problem with stalling
when shifting gears.
Let It stand for 15 minutes jump In start up select either D or R and
back to near stall or full stall.
Seems this problem Is worse at about quarter engine temp
range. On the road runs well as It should.
The other problem Is a hesitation when at normal run temp
just as you start to press the gas pedal revs drop by about
100 RPM and can stall the engine.
Done this a few times pulled up put In reverse foot
down hesitates then stalls.
Any Ideas on this one?
If the engine run system says everything Is ok where do I
look next? Mileage Is 76,000 car only used In Summer.