berlincam86

What would cause my car to hesitate and stumble only when it's hot and only at about 45 miles an hour? It idles fine.

FireBirdKnight

does it do it when going into Overdrive?

berlincam86

I don't think so. I can put in regular drive and it will still do it.

FireBirdKnight

mine does that as well but usually starts to act up by spuddering and hesutating during Overdrive but most ppl say thats lugging

berlincam86

This is really bad I can't get my car to go 55. If I try to push it it will stall. I can ven put it in neutral to rev up the engine and it will bog and if I keep the pedal down it will stall. What gets me is it only does it at 45 and when it's hot. when it's cool and from idle I can burn up the tires.

wrightz28

Problems that become apparent after warmed up usually point to an ignition problem usually the ICM, the stall is probably due to the fuel is being dumped, but not enough spark to set it off thus flooding it.

berlincam86

I have alot of new parts. I have replaced the coil, module, dis cap, rotor, wires, plugs, oxygen sensor, knock sensor, fuel filter, fuel pump, timing chain, water pump, radiator cap, heater core, thermostat, rebuilt the carb, set the dwell with a snap on scanner, tried changing the computer and map sensor with used ones but still no change. I don't think it's transmission related because it will do it in neutral if I slip it while i'm going 45. according to my scanner all the sensors are working fine. I'm thinking maybe the float or timing. The timing is set at 6 right now. someone told me to try 8 or 10. Can anyone help me please this is my only car.

Sonix

iTrader: (1)

not tranny if it bogs while revving it in neutral. or park for that matter.

if you keep the pedal down, and it stalls, sounds like it's not getting enough fuel.
while idling, look down your primary throttle bores, flick the throttle, are you getting accelerator pump shot?

did you adjust your lean stop while rebuilding the carb? I'm not super familiar with the cc-qjet, but if you "tightened" it, that'll cause a nasty bog.

make sure your choke is coming all the way off.

if you didn't touch your float, it'll be the same as it was before you rebuilt it, probably good enough to drive the car normally. If you have to tear the carb apart again, i'd check it though.

berlincam86

Yes I am getting the accelerator pump shot but it's not at idle i'm having the problem. it's good till it's hot and i'm at about 45 miles an hour then it will spit and sputter and not go any faster till I let up on the gas pedal then it will stop sputtering but if I touch the gas again it does it again. No I didn't do anything with the lean stop. I adjusted the rich stop to the 1.304 spec as the book said and I have the 4/32'' travel. The choke is a little loose but I wired it open and it still does it. I changed the float so i'm thinking maybe it's not adjusted right. Which way should I go? Up or down? I'm thinking it may be too low. Am I right or wrong?

joe350

Usually engine problems manifest themselves at an RPM range, not a speed. 45 MPH is about the speed that your torque converter lockup should engage. I don't see how it would cause this problem its worth considering.

berlincam86

well it was the float. It was too low I raised it to the recomended height. It's better now. What I guess it was doing is being too low it would be fine till it heated up then the fuel was being boiled or evaporated out of the bowl even more making it starve itself for fuel at that speed. I'm guessing anyway i don't know if i'm right or not but it sounds good to me.