What are you doing to your rig - the continuing saga

Instead of stuffing more stuff under the hood, stack it on top of the hood: A low profile heat exchanger, with some pusher fans and a louvered cover...another Franken Hood.
 
got 2 o2 sensors from u pull n pay. no change, engine still sputters and backfires. the cam sensor in the dist is 50 and i can get a reman dist with cam sensor for 50.
where else do i look for this stuttering and backfiring?
 
How are your ignition parts? plugs, wires, cap, rotor, coil?

backfires into the intake are usually lean condition caused... lack of fuel from a failing pump or plugged filter, plugged injector...
 
Digger87xj said:
How are your ignition parts? plugs, wires, cap, rotor, coil?

backfires into the intake are usually lean condition caused... lack of fuel from a failing pump or plugged filter, plugged injector...
Click to expand...
perhaps i described it wrong. loud boom out teh tail pipe. already destroyed 2 mufflers with this problem.
so was checking out the tps. runs the same whether plugged in or not. runs slightly different if adjusted and moved and checked. i am reading up now on the adjustment procedure.
could this be from the cam position sensor (hall effect) in the distributor?
and no idea on condition of cap and rotor etc. i am trying to get it to pass emissions so in can get plates. it runs good except for holding a steady speed at any rpm range.
getting very annoyed here.Hasta
 
Digger87xj said:
well loud booms out the tailpipe is caused from raw fuel in the exhaust.

check your tune up.
Click to expand...
hmmmm
cap rotor etc?
if the dist is set wrong i can see how that can cause a ton of crap. more so if the advance is extreme and too far. as in firing with an open exh valve and burning the crap down the pipe and not in the cylinder. hmm i ll go check out my junk. so to speak LOL
 
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rotating the distrib does not change ignition timing. It does change when the injectors fire.

A nice thing about the renix, you can disco the sync sensor and it will start in non-sequential mode. So, disco the sync sensor and run it. It will crank for a bit but will start. see if your problem changes.
 
it made no difference . i am really out of money and massively frustrated at this point. i need to have it working so i can get plates on it. i have other things i need to repair on it but this is most important.
 
I have to thank Digger for his posts on overheating. I drive the 90 so infrequently I don't think about it much, and on the highway and in town it holds temps fine. But when I had to yank Zac off of the brink of disaster, it did start to overheat while idling for some time with the auxiliary fan off. So I've been meaning to check to coolant level for some time(open system with an aluminum overflow bottle, have to take off the radiator cap) and today in the midst of reading those posts, I finally rememberred. :) It was low, and I realized I had the overflow bottle configured wrong and fixed it. Thanks. :)
 
the subconcious mind at work LOL

Fred said:
I have to thank Digger for his posts on overheating. I drive the 90 so infrequently I don't think about it much, and on the highway and in town it holds temps fine. But when I had to yank Zac off of the brink of disaster, it did start to overheat while idling for some time with the auxiliary fan off. So I've been meaning to check to coolant level for some time(open system with an aluminum overflow bottle, have to take off the radiator cap) and today in the midst of reading those posts, I finally rememberred. :) It was low, and I realized I had the overflow bottle configured wrong and fixed it. Thanks. :)
Click to expand...
 
Gunter,

Do you have the Renix fuel injection manual? I have it on PDF, and I can send it to your email if you like.

You can PM your email address.
 
Having said that, it's not on this computer like I thought it was. I'll have to look further.
 
Digger, I'm looking at this and thinking...

341 square inches (stock XJ 4.0 radiator) = ~2.4 square feet
589 square inches (stock BR 5.9 radiator) = ~4.1 square feet

That's only a difference of around 1.7 square feet, 21"x12". I've seen small radiators from passenger cars that are around that big, maybe run one in tandem with the main radiator. Any thoughts on where to mount one?

Mine's going to be a pavement queen so I may be able to pick up that much area inside the fronts of the fender wells with a large heater core and a fan + ducting, but I don't think that'll work for you.
 
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