I have a annoying problem with my TJ. It's very hard to diagnostic, because DRB scan tool show no error codes
First I need to explain the problem. After driving for so long, say 20-30km, it starts to act up as if it was running out of fuel. Backfiring, cutting out, loss of horse power ect... It does it whether you try giving it a little gas or the whole petal. But it only does it after being driven for awhile and its hot outside. When the temperature outside cools off and during the winter it doesn't act up at all. When it's not acting up it runs great and no problems. Sometimes I can put it in neutral and turn key off and back on and it fixes for a short time. Other times I have to actually pull over and turn the jeep off and let it sit for approx 10 mins and it's back to normal again for a short time. It's not showing any warning lights inside of any kind. All gauges are at normal places and throwing no codes. There are no vacuum leaks that have been found after several times looking and listening. My theory is something is getting too hot I just can't figure out what. If someone could please help me I would for ever be grateful.
And there is occasionally problem with throttle body - when i stay and want to drive - adding a little gas and the engine miss for a half or one second and then go with power. Looks like the engine power is delayed from the added gas on the petal. Occasionally have the same problem when driving slowly, i quickly add much gas and the engine power is delayed in cca. one second.
I have new TPS, changed MAP sensor / new distributor cap, rotor and ignition cables too. No codes on DRB II. Everything looks good, i checked wiring harness, cleaned the connectors, blah, blah..
But the problem is still here and gets annoying and hard for my "bucks"
I have ideas, it is the crankshaft position sensor?, or camshaft sensor? Or fuel pump, or filter. The air filter is new, throttle body and air intake manifold is cleaned.
Any tips guys, please help with this shit