ADDgolfer
Junior Member
- Joined
- Feb 17, 2016
- Posts
- 4
- Reaction score
- 0
- Ram Year
- 2003
- Engine
- 4.7
2003 4.7L
Could my ECM/ECU not be playing nice with the replaced crate engine?
No codes
Rich gas exhaust smell before Cat replacement
Still smells rich, but not as much
Blew it up in 2015 on a rare below freezing Florida morning. Stressed it a few times before that by overheating from a bad radiator. Was using flush in the radiator before I replaced it when that cold snap hit. No antifreeze.
It sat in the driveway for a year. Drove wife's car as her new work schedule coincided with mine, and her work was on the way.
Replaced the 4.7L engine in Jan 2016 (crate engine) when I retired. Ran smooth except for no 'passing gear' It dogged in WOT, and the mileage went from 16 mpg to like 12. Sat some more, only 3,000 miles since 2016 until last month when wife's low mileage, one owner, 09 Lexus got totaled
The catalytic wound up being the reason for the ******* and serious poor gas mileage, but still not getting anywhere near 16 mpg average
No codes but replaced the O2 sensors (just 2 on my truck) the platinum plugs back to copper core, replaced the stock air intake with a cold air intake. Throttle response is sharp and love the growl
I have spent a few $$ on one idiot mechanic then one old timer who told me it was the Cat and he was right, but he is just guessing at the poor fuel mileage, after taking it back when the Cat was replaced, hoping he would hook up his $5,000 diagnostic equipment to read live data, (he boasted about it), but just gave me a list of things to replace.
Are professional OBD readers and a capable tech able to decipher data of timing, or air/fuel mixture even tho codes aren't thrown?
Back to that replacement engine. The company asked for VIN and were careful to match the replacement to the one my truck called for.
Could my ECM/ECU not be playing nice with the replaced crate engine?
No codes
Rich gas exhaust smell before Cat replacement
Still smells rich, but not as much
Blew it up in 2015 on a rare below freezing Florida morning. Stressed it a few times before that by overheating from a bad radiator. Was using flush in the radiator before I replaced it when that cold snap hit. No antifreeze.
It sat in the driveway for a year. Drove wife's car as her new work schedule coincided with mine, and her work was on the way.
Replaced the 4.7L engine in Jan 2016 (crate engine) when I retired. Ran smooth except for no 'passing gear' It dogged in WOT, and the mileage went from 16 mpg to like 12. Sat some more, only 3,000 miles since 2016 until last month when wife's low mileage, one owner, 09 Lexus got totaled
The catalytic wound up being the reason for the ******* and serious poor gas mileage, but still not getting anywhere near 16 mpg average
No codes but replaced the O2 sensors (just 2 on my truck) the platinum plugs back to copper core, replaced the stock air intake with a cold air intake. Throttle response is sharp and love the growl
I have spent a few $$ on one idiot mechanic then one old timer who told me it was the Cat and he was right, but he is just guessing at the poor fuel mileage, after taking it back when the Cat was replaced, hoping he would hook up his $5,000 diagnostic equipment to read live data, (he boasted about it), but just gave me a list of things to replace.
Are professional OBD readers and a capable tech able to decipher data of timing, or air/fuel mixture even tho codes aren't thrown?
Back to that replacement engine. The company asked for VIN and were careful to match the replacement to the one my truck called for.
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