hello again all,
have a little problem and need a help. when i start the jeep in the morning or after being parked for a awhile in cold weather if i give it any gas it stumbles or sounds like its choking/bogging down. thats only if i apply gas peddle.. if i start it and just put it in drive and go or dont touch the gas you wont even notice the problem. if it sits in the sun and i start it, it doesnt do it. ONLY COLD starts not hot.. now when i give it gas and it chokes/bogs and i let off the gas it imediatly stops bogging/choking and idles great! give it gas and it bogs/stumbles again. let off and its fine again. this only lasts for maybe 20 seconds. after that it will not do it again til next morning start and all day its fine, idles fine, accelerates fine. due to a different problem this is a list of whats newly replaced recently...
*plugs (champion .35 gap)
*wires
*cap and rotor
*map sensor
*ECT sensor
*IAC valve (cleaned throttle body and iac passage)
*fuel injector cleaning (through rail)
*IAT sensor
*fuel filter
*air filter
*all vacuum hoses
*battery
*o2 sensor (denso brand, accidently dropped before install=problem?)
*oil and filter change
*fuel pressure regulator
after reading a bit im thinking possibly when i dropped the o2 sensor the heater element inside broke. i read its to help get the o2 online faster in the mornings to get a/f ratio regulated. shifts fine cold or hot and has NO other signs of any problems after warmed up 20 sec.
any ideas what might cause this ONLY on cold start for maximum of 20 seconds??