Car would start idle really bad. Take off really bad spitting and sputtering then smooth out and be ok to drive. @ stop and start again did fine. It was hit and miss. Changed plugs and wires, still runs bad. Now it won't even idle. It'll idle when you spray carb cleaner into it but when you stop spraying it stops running as if its not getting gas. I hear the fuel hum when I turn the key. Could the fuel pump be bad?

43 ignition control circuit not responding

Possible bad igntion control module (built into in PCM)

partially blocked fuel filter or clogged injectors. Good place to start. Also, does that truck have a coil for every cylinder?

This can be caused by a problem in the fuel pressure check valve of the fuel pump. Have a pressure leak down test run by a shop, if the system is losing pressure then the pump assembly must be replaced. The fuel pump is located inside the gas tank and is electric

Hi,just to see if the spark is ok there is a light that fits inbetween the ht lead and spark plug so you can see if the spark fails why the car is running,hope this was some help.
you should be able to get one from your local car spare shop or on ebay,all the best hope you sort it.

i would suggest changing the fuel filter if this does't work check the fuel pressure. and get a mechanic to check the ecu fault codes. as this could be caused by a electronic fault.

idle control valve ,where it is and what it looks like on this vehicle i honestly havent a clue ,none of these cars here in spain

Somewhere along the the line you may have a fuel blockage or a good dose of water in your fuel tank.Check the water in tank 1st.Add 1 litre of metholated spirits to every 20 litres of fuel.This will allow the water to break down and be burnt through the motor over time.Do this twice.If this does not work,there may be a glob of **** in the fuel tank that blocks the pickup.If this is the problem,the tank needs to be taken out and cleaned.I hope this is a start to get you back on the road.

I have the same problem on my 95 grand cherokee laredo. Sometimes it starts out fine and after about 10 miles it starts spitting and sputtering. Then after a while it seems to clean out and run fine again for a little while. Then other times it starts out spitting and sputtering at the begining. I changed the fuel filter and that was not it. It is a 4.0L 6cyc. Any Ideas?

Thanks,
Broken Arrow, OK

sounds like a fuel pump problem,with fuel pumps u can have pressure but not enough volume,try goin up a steeper hill in 2nd gear and get about 3000 rpms on the engine and see if it really drops out bad and is really gutless,if that happens without a check engine light coming on it might be yur pump and u should also replace the fuel filter at the same time,hope this helps

if there is not a vacuum leak it seems that the signal wire to the MAP is either open or shorted to 5 volt reference wire. if not either of those may be the PCM