The1AndOnlyBug
NAXJA Forum User
- Location
- Denver, Co
Ok so here we go, I have owned 3 YJ's with my last one in Colorado springs/Denver and built just too small for carnage canyon, so I'm very familiar with jeeps and 4.0's.
I bought my wife a '01 XJ and 6 months later the engine blew, still ran but really bad knock, no power, oil in the coolant and overheats after 5 minutes. So I found a new engine. $800, Fresh rebuild, 0 miles, unfortunately it was from a '02 wrangler, doesn't fit. So I find another engine, $500 it is from an 87-90 Comanche bored 30 over and about 60-70k on it.
I removed the bad engine got everything bolted up to the MJ engine (after porting my horseshoe intake to match the head, along with adding a header, and a heavy duty transmission cooler.) got the engine installed in this nightmare of a vehicle (I miss the room I had in my YJ's) and started it right up.
Well it idles fine, but upon startup there is a horrible screeching from the front of the engine that lasts 2-3 secs, my headers are glowing red, I've got a header leak ( may explain the glowing, running too lean) I had to ground bus pin 4 to get the scanner to work (triple checked all grounds with a multi metre), and I'm throwing a handful of codes.... P0700 P1687 P1698. I can read all sensors while the vehicle is running so if someone tells me the perimeters then i can tell you what its reading.
Biggest issue is I have less that 24 hours to have this vehicle fixed, I am supposed to be picking up a uhaul trailer and moving from VA to ME tomorrow....... if I was still in CO I could have a wrenching party with several jeepers, but out here in va.... My options are limited.
If it makes any difference a couple times when I reved it up it backfired through the intake.
I bought my wife a '01 XJ and 6 months later the engine blew, still ran but really bad knock, no power, oil in the coolant and overheats after 5 minutes. So I found a new engine. $800, Fresh rebuild, 0 miles, unfortunately it was from a '02 wrangler, doesn't fit. So I find another engine, $500 it is from an 87-90 Comanche bored 30 over and about 60-70k on it.
I removed the bad engine got everything bolted up to the MJ engine (after porting my horseshoe intake to match the head, along with adding a header, and a heavy duty transmission cooler.) got the engine installed in this nightmare of a vehicle (I miss the room I had in my YJ's) and started it right up.
Well it idles fine, but upon startup there is a horrible screeching from the front of the engine that lasts 2-3 secs, my headers are glowing red, I've got a header leak ( may explain the glowing, running too lean) I had to ground bus pin 4 to get the scanner to work (triple checked all grounds with a multi metre), and I'm throwing a handful of codes.... P0700 P1687 P1698. I can read all sensors while the vehicle is running so if someone tells me the perimeters then i can tell you what its reading.
Biggest issue is I have less that 24 hours to have this vehicle fixed, I am supposed to be picking up a uhaul trailer and moving from VA to ME tomorrow....... if I was still in CO I could have a wrenching party with several jeepers, but out here in va.... My options are limited.
If it makes any difference a couple times when I reved it up it backfired through the intake.
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