93 Chevy G20 Van with 5.0L Vin H and 4L60e
I have a 93 G20 Van that I have owned for 7 years
I did a full service at the time I bought it with 143k on it (now has 175k)
The service included all the sensors, EGR, IAC, Distributor, Timing chain, New built transmission as well as tons of non engine related parts (all GM / AC Delco parts used for the Sensors and valves)
I drove it for 5 years and it ran GREAT, super reliable. It kinda boogies for a 5.0 !!
but i parked it and has been sitting for the past 2 years, starting it every few months and now I have a 1500/1800 rpm hesitation.
It starts fine, idles fine... pulls off idle fine , until it hits the 1500/1800 threshold ??? But I can push past the hesitation and it will run great after that all the way up to 85/90 mph
It also free revs in neutral/Park fine.
After going through and testing all the sensors, etc ( which checked out fine) I am lead to believe its the PCM, I have had to jump it a few times since its been sitting
which is why I am posting here. I am having a difficult time identifying the PCM
as far as I can find, the PCM is supposedly for a V6 ...Wait , say what!!! yeah from what I could find, the 7427 with the BJSX Prom is for a V6... so, how could it run so great for all those years if its for a V6?!?!
Besides my PCM concerns, am i overlooking something? Any help would be greatly appreciated :rockon:
