I have a 99 civic lx, mini me with a z6 head, I/E/H, p28 ecu. In the morning ( or when I havent drive my car for a while) when I start my car it starts and dies. The second attemtp it starts and the rpm go up and down for like 1 min or less them it idles fines. I change the primary O2 for the seconday (P28 only uses 1).
The other problem Im having is sometimes when I have drive my car for a while when Im in any gear at low RPM the car its like hold then at a higher RPM it is fine,
What could be the problem. Thanks for ur help in advance.
I did search and didnt find an answer,

 

I forgot to mention I have change the IACVlike 3 times, I change my coolant sensor too.

 

bump for some help

 

how is your alternator?

 

i had this same exact problem when i swapped a gsr into my hatch. I forgot what it was, my friend fixed it though. I can't say for sure because back then i had a friend do the swap for me but I think it was the TPS sensor, check to see if its good because yeah... mine would go up and down too.

 

Check FITV.

 

What is FITV?
My alternator is OK, so thats not the problem. I will check TPS.

Today happend a new thing, When I ere driving back from college the car start to do the hold problem, Not only at low RPM Low and mid range the car is like out of power then it relase all the power. The egine light came and was code 7 and 14, TPS and IACV, I checked both and the voltages and all things are ok, I remove the Hazard fuse to reset the ecu, the check engine disapear and the car was fine, but again when I drive it for la little while the problem camo back ,no cels and not as big as today, but stills there.

Please help me, this is driving me crazy

 

bump for help

 

When it starts then dies, does it take a while for it to start back up?

 

Nop, it starts fine. No overcrank

 

one bump for help