89 xjs passenger side bank is not firing
#1
89 xjs passenger side bank is not firing
Hey Everybody, thanks for reading this hopefully you don't get too annoyed with me. I've been searching the archives and I think I'm just getting more confused of where to start with this.
I have an 89 xjs thats been sitting for awhile and I'm trying to bring it back to life. The car will start and idle kinda rough, however I don't think the passenger side of the engine is running. The reason I think this is because:
1. when the car is running, there is no air being drawn into the passenger intake.
2. The passenger exhaust has a steady stream of exhaust coming out that is not being broken up by cylinder firing.
I took apart the distributor and although it is not a marelli, everything looked good and new. I also pulled one of the plug wires, attached a plug to the end and was getting real good spark.
Now my mechanical knowledge says that I have a cylinder head problem, but I'm hoping maybe it's a sensor or something else.
Thanks in advance for any direction I can get...
Or if anybody is in north east pa and wants to make a few bucks to come and give me a hand, I'd be open to the help!
Thanks again
I have an 89 xjs thats been sitting for awhile and I'm trying to bring it back to life. The car will start and idle kinda rough, however I don't think the passenger side of the engine is running. The reason I think this is because:
1. when the car is running, there is no air being drawn into the passenger intake.
2. The passenger exhaust has a steady stream of exhaust coming out that is not being broken up by cylinder firing.
I took apart the distributor and although it is not a marelli, everything looked good and new. I also pulled one of the plug wires, attached a plug to the end and was getting real good spark.
Now my mechanical knowledge says that I have a cylinder head problem, but I'm hoping maybe it's a sensor or something else.
Thanks in advance for any direction I can get...
Or if anybody is in north east pa and wants to make a few bucks to come and give me a hand, I'd be open to the help!
Thanks again
#2
#3
Thanks, I'll start with that...
I agree with you, What I can tell you is that I can hold my hand over the right side intake and there is no suction. Now, when I take the filter cover off, there is a ton of air being pumped in through the breather, that must be where it's pulling it's air from.
I will check spark on all wires and check the injector pulse and report back.
Thanks for the advice.
I will check spark on all wires and check the injector pulse and report back.
Thanks for the advice.
#5
How do you know it is not a Marelli? How big is the distributor?
#6
warren
yes the exhaust is hot.
I was working on it this morning, going on the advice of m90power. I got under the car and noticed that it is true dual exhaust front to back. So m90power and you are correct in that there is air being drawn in and exhuasted.
I am totally new to jags and v12's. I guess what is throwing me off is that the drivers side is really drawing air in strong and pulsating from the exhaust, while the passenger side is hardley drawing any air at all and the exhaust gas is very smooth.
I'm still going to get some noid lights today and check the injector pulse.
I do think it is a marelli ignition, but the cap and rotor are aftermarket.
I was working on it this morning, going on the advice of m90power. I got under the car and noticed that it is true dual exhaust front to back. So m90power and you are correct in that there is air being drawn in and exhuasted.
I am totally new to jags and v12's. I guess what is throwing me off is that the drivers side is really drawing air in strong and pulsating from the exhaust, while the passenger side is hardley drawing any air at all and the exhaust gas is very smooth.
I'm still going to get some noid lights today and check the injector pulse.
I do think it is a marelli ignition, but the cap and rotor are aftermarket.
#7
Join Date: Mar 2008
Location: Pacific Northwest USA
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As far as *that* particular aspect goes...it's perfectly normal on the V12 so you can out it put of your mind
Cheers
DD
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#9
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#11
The exhaust from each side of the V12 should be a smooth flow air with No pulsing
You can identify Marelli by having 2 HT leads going into the distributor. It will also have 2 ignitors on the top radiator support and a 3 tooth reluctor wheel on the crank
#12
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