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thatcabledude
GOLD Star
Same here.
You could look at live data and see what readings the ecu is putting out, especially the map reading. Could be a map sensor going bad.
I replaced it w/ an O’reillys MAP while in Moab.
Is the code present everytime it stalls or sputters?
Any vac leaks on the intake, fuel pressure readings, wiring all good?
not every time, because sometimes it would die before it had enough “drive time”. No leaks that I’ve found. I need to get a fuel pressure gauge.
wiring should be spot on.
the truck had been running like a top prior to this trip.
I would monitor live data then when its acting up. See what the map reading is, TPS reading, etc. Check the wiring of the map as well. Also check your main ECU plugs especially the map wires for any evidence of loose or not fully seated pins.
Which shop did the work?
I'm getting ready to swap in an lq4 out of an 02 denali into my 95 and have been searching a ton of build threads on which exhaust manifolds to use. Is there anyone thats done the swap in California that can chime in on what headers they used? I am going to have to get the truck reffed once done so wondering what smog legal manifolds/headers I should try and use. I'm not sure if the hooker block huggers are smog legal and have read that the cts manifolds dump into the frame. Any help is greatly appreciated.
thatcabledude
GOLD Star
IIRC, it was a shop called Horsepower Solutions in VA.
I wouldn't do headers until after going to the REF...
Even with an EO number you still need to make sure those headers were offer to that particular engine year...
Once you get your CARB sticker it would be much easier to slap any year EO# headers in there..
That's what I figured. Are there fitment issues when using the stock manifolds (02 denali xl)? I was able to get the cats from the donor truck but I'm assuming they will need to be significantly altered to fit.
thatcabledude
GOLD Star
I can’t imagine the stock 02 manifolds working. It’s been a few years, but I’m pretty sure that was a big no go.
Thanks for the info. I'm gonna try and stop by a local ref and see what my options are as far as exhaust manifolds. Trying to source all the parts before I pull the motor. Living in this state is getting old
thatcabledude
GOLD Star
No doubt. From all the stuff I’ve read on here I wouldn’t even attempt a swap. I’d have to setup an LLC in Montana or something.
This is not correct. Pick the headers you want that are approved for the year of the motor and weight class, period. No difference at all if pre-referee or not. Approved is approved. It would actually reduce future inspection headaches, as the EO# for the headers would be printed on the BAR Label applied, after approval of the swap.
thatcabledude is correct. It was Horsepower Solutions in VA.
Looking for some general feedback here. I’ve got almost 1000 miles of drive time in my swap and still learning the new setup, but curious for feedback based on what others have experienced.
My setup is 6.2l, 6l80, 4.88 gears, 37’s, 3:1 crawler gears. New OEM factory radiator, derale fan shroud and dual electric 13” fans.
My coolant temps have a pretty broad operating range. Doesn’t seem like a problem, just a new experience for me.
Example:
1. highway cruising at 70mph, 55* degrees outside my temps are 170-185.
2. Similar drive with random highway acceleration from 70 to 80mph, 80* degrees outside, I’ve seen temps operate 200-205, but jump to 212 when downshifting and accelerating. Quickly comes back down when I let off.
3. 4LOW, first gear and going uphill at 2500-3000rpm’s and temps are 200-213*.
The shop owner that did the work felt that anything under 220 was fine for the motor but still curious what other are seeing. These temps seem normal based on reading from Chevy forums but just getting use to seeing 170-215* operating temps
(Yes, I searched but didn’t seem to find much that was definitive)
My setup is 6.2l, 6l80, 4.88 gears, 37’s, 3:1 crawler gears. New OEM factory radiator, derale fan shroud and dual electric 13” fans.
My coolant temps have a pretty broad operating range. Doesn’t seem like a problem, just a new experience for me.
Example:
1. highway cruising at 70mph, 55* degrees outside my temps are 170-185.
2. Similar drive with random highway acceleration from 70 to 80mph, 80* degrees outside, I’ve seen temps operate 200-205, but jump to 212 when downshifting and accelerating. Quickly comes back down when I let off.
3. 4LOW, first gear and going uphill at 2500-3000rpm’s and temps are 200-213*.
The shop owner that did the work felt that anything under 220 was fine for the motor but still curious what other are seeing. These temps seem normal based on reading from Chevy forums but just getting use to seeing 170-215* operating temps
(Yes, I searched but didn’t seem to find much that was definitive)
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standard operating temps for that combo is 210 deg F. What thermostat do you have in it? Are the fans controlled by the computer? You can change the on/off of them with programming. I have that engine tranny combo in my race car. It is a lot of fun. Talk to Zero Gravity performance on tuning your trans.
Thanks for the quick feedback. I believe t-stat is 180*. Fans are computer controlled and kick on at 204* I believe. Shop that did install did tune trans and shift point during the final motor tune and so far the shifting seems great. You aren’t too far away from me so would love to let you check it out and see what you think of the final setup.
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