Guess you'll know Friday. Just a thought though. What happens if it's smoken enough to foul-up the O2 sensor? Not to mention the cat.

 

Well luckily its before 96 so no emissions here in Illinois. And how the hell do u test this damn computer in the jeep? Where do u plug it in? I was trying to find a plug but either I'm blind, Polish (and yes I am from Poland) or nothing is there.

 

There is only one way to hook up a renix to a scanner. You don't. The coding is drb1 or something like that, can't remember exactly. The machines used to analyzes are no longer available( maybe on eBay for 1000+) I have heard of a very expensive snap on scanner that is compatible with the correct cords but were talking thousands of dollars. Thing with renix is all the sensors are testable with a multimeter. Lunghd.com has directions for that. Whether you hook it to a drb or use a multimeter it still has to be running. Testing is real time. The ecu doesn't store codes.

 

No **** OK. so if I find a 95 or newer Jeep cherokee might just pick that and scrap this old xj Roche metal scraper

 

Personal preference. I like the 87-90 because of the loose parameters. I have the knowledge and experience to easily trouble shoot the system though so it works for me. If you aren't very experienced the newer ones might be for you. It is much easier to pull trouble codes then it is to break out the multimeter, vacuum gauges and compression tester.

 

That 90 came with POS injectors. Could be leaking, Wonder if the fuel pressure doesn't drop right down. Guess they will check that. Guess you can get a set for around $100. (I'm planning in getting a set for my 90. The replacements have 4 holes (instead of one),and atomize the fuel better)


"When I unplugged these 2 wires on the driver side from this white ivory looking module the engine sounder perfect then died." (when he KO'd the fuel pump)

"And I smell gas after attempting to turn her on."


"And the oil did smell gaseous."

The MAP sensor is high in the firewall near the middle. It has only one vacuum line to it, plugs into that rubber plug in the throttle body. If the line is busted, off, cracked, leaking, the computer will think you have it floored and give extra gas. You should be able to feel vacuum with your finger on the line when you un-plug it off the MAP)

 

Could very well be the injectors. Like I said only other thing I could think of causing that blow by would be a very rich conditions.

 

Yea, that's a new one on me. Could one, (or more), be dumping so much fuel it rinsed the cil so much it scored it? (that and thinned oil from it dripping).

Do you know HOW over rich results in Blow-by? Man these forums rock. Between bleepingcomputer, smokstak, and here....lots of info!

Freedgr...that link in post #53 THANKS. Clear, thorough. (had to go direct from your post for some reason, couldn't store/paste it).

 

Don you crack me up. It can wash the cylinder wall and cause problems with the rings sealing and cause scoring with the lack of lubrication.. Gotta be pretty rich but that rich condition would cause rough idle, bucking and stalling.

 

dumping so much fuel it rinsed the cil so much it scored it

and

wash the cylinder wall and cause problems with the rings sealing and cause scoring

Yea bud, I'm following, just hadn't put it together that's what you meant. Thought there might be some other "process"

Bummer if an old 53003956 injector ruined an engine without even causing a fire.

 

It's called "making oil". Common in the older mechanically injected diesels. OP should see if his oil livel is also rising on the dipstick. I mentioned another test earlier for the oil involving letting some drip on your skin and observing what it does.

 

I still haven't been able to get around to test that, I might be able tomorrow, I've been busy running around like a chicken with its head cut off.

 

OK so tomorrow is the big day. We shall see what had to be done on my XJ, I have my appointment at 12. I'll keep u all update.

 

OK so I'm about an hr or so I will know exactly what's wrong with my jeep. Let's hope its a minor fix. Ivtold the guy that if its something basic, that I can fix then, to leave it alone, but if its a little more in-depth then he will, but if its a new engine or engine pull out then I'm scraping her aand looking for a different XJ.

 

Just a bad o2 sensor lol