azjeeps tj&xj
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Ok, I have a stock 88' XJ with a 4.0L w/auto. The motor is stock from what I know, but the head was rebuilt recently. Took it in for emissions today and it passed everything except the Carbon Monoxide measured in grams/mile. It read 63.34 and the standard (max) is 25.00. I am taking it as it is running rich. Now the 88' runs the best between the two (other is a 90'), but the 90' past with no problems this last year.
I just checked the TPS and it read 3.86V, where it should be 4.2V. Now the input voltage was only 4.68V and it should have been 5.0V. So I figure it was within the 82% that it should be for being closed. I adjusted it to 4.18V to get closer to the 4.2V, but not sure if that will fix the problem.
I looked at the purge system, and all the lines look good, and the idle is fine, and I don't hear any vacuum leaks.
Now I only get one retest for free, after that it is another $30 to test. I am also thinking about switching the MAP sensor with the one from my 90', even though I did test it and it tested good, but all that does is show if voltage is getting through. Another option I was thinking about was just taking the injectors, regulator, and rail from the 90' and putting it on the 88' and see if that helps.
So does anyone have any ideas on what to do to get this thing back on the road?
I just checked the TPS and it read 3.86V, where it should be 4.2V. Now the input voltage was only 4.68V and it should have been 5.0V. So I figure it was within the 82% that it should be for being closed. I adjusted it to 4.18V to get closer to the 4.2V, but not sure if that will fix the problem.
I looked at the purge system, and all the lines look good, and the idle is fine, and I don't hear any vacuum leaks.
Now I only get one retest for free, after that it is another $30 to test. I am also thinking about switching the MAP sensor with the one from my 90', even though I did test it and it tested good, but all that does is show if voltage is getting through. Another option I was thinking about was just taking the injectors, regulator, and rail from the 90' and putting it on the 88' and see if that helps.
So does anyone have any ideas on what to do to get this thing back on the road?