TJ Morning Start Fine, Idles Fine, Second start requires throttle to start
Ok, I have researched the forums for a few days and have tried a few fixes for the issue I am experiencing i.e. cleaned throttle bottle, cleaned IAC, and then replaced IAC. The issue I am experiencing is a little different than most posts I see here. Let me explain.
I have a 99 TJ, 4.0L I6 w/ 110,000 miles
The issue is this:
1) First start in the morning is great, it starts right up
2) After letting the car sit in the parking lot for 9-10 hours at work, it starts right up
3) After starting the engine, it idles fine
4) During a second start, such as starting the engine anytime after the first start up to 3 to 4 hours later, it cranks but doesn't start unless throttle is applied. It doesn't take much throttle, maybe 25 to 50%. Before cleaning the throttle body it took closer to 75% throttle to get it started. After it is started the engine idles fine. If I throttle it up to 2000-3000rpm, engine speed does tend to slowly drop after lifting off the throttle for about 2-3 seconds, like it's hanging a bit.
I don't have any codes, so I didn't suspect the TPS. For the throttle body cleanup, I used CRC for throttle body to thoroughly clean the throttle valve. I sprayed the IAC channels, but couldnt thoroughly scrub them clean. I reinstalled the throttle body and used about 1/4 of the can to spray into the IAC air intake with the engine running as I seen some people recommend.
Thanks for any suggestions in advance.