Stuka87
NAXJA Forum User
- Location
- Twain Harte, CA
Ok, so as the title says, '89 XJ with a 4.0 and an AW4. At idle it runs ok (idle fluctuates some, but no missing), rev it up in neutral and it seems fine. Great throttle response, no discernible missing.
However, put it in gear and give it some gas (while on the brakes, or go drive it) and soon as there is load on the engine, it starts missing. This started as a now and then thing, and now its to the point that its really pretty bad.
I have done some searches on here to try and find a common cause, but I havent found any post with this exact issue.
I should note that I gave it a tune up a year ago (Cap, Rotor, Wires, Plugs, coil was done about 2 years ago by PO).
Here is what I have found:
1: I check the TPS (it was replaced 2 years ago by PO), idle voltage is at 0.288, however WOT is only at 3.9V. The source voltage is 5.0 with the connector unplugged. With it hooked up, the Voltage drops to 4.9V (acceptable?) I did a check of the grounds, they all look clean (California, zero rust anywhere) and OHM out ok.
2: I checked the EGR, and the line going from the solenoid to the EGR is cracked, so the EGR never opens. I will fix this tomorrow, but I highly doubt its my issue. I check the source vacuum going to the solinoid as well, and its right at 15 Hg.
So, I am kind of stuck, I am not an expert on these Renix engines. So I don't know all their quirks or common issues.
Any help would be greatly appreciated
EDIT: Forgot to mention the engine has 182K miles on it.
However, put it in gear and give it some gas (while on the brakes, or go drive it) and soon as there is load on the engine, it starts missing. This started as a now and then thing, and now its to the point that its really pretty bad.
I have done some searches on here to try and find a common cause, but I havent found any post with this exact issue.
I should note that I gave it a tune up a year ago (Cap, Rotor, Wires, Plugs, coil was done about 2 years ago by PO).
Here is what I have found:
1: I check the TPS (it was replaced 2 years ago by PO), idle voltage is at 0.288, however WOT is only at 3.9V. The source voltage is 5.0 with the connector unplugged. With it hooked up, the Voltage drops to 4.9V (acceptable?) I did a check of the grounds, they all look clean (California, zero rust anywhere) and OHM out ok.
2: I checked the EGR, and the line going from the solenoid to the EGR is cracked, so the EGR never opens. I will fix this tomorrow, but I highly doubt its my issue. I check the source vacuum going to the solinoid as well, and its right at 15 Hg.
So, I am kind of stuck, I am not an expert on these Renix engines. So I don't know all their quirks or common issues.
Any help would be greatly appreciated
EDIT: Forgot to mention the engine has 182K miles on it.
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