newbie needs help!!!
hello all I am very new to the jeep scene. I just bought my first one. I have a 1987 cherokee w/4.0 I6 and an automatic tranny. it kinda jolts when I am moving but not heavy on the throttle. its almost as if I had shut the motor off and back on again in a split second or maybe a hick-up. but the only thing I notice is that the tach drops a little and then it back to normal until it happens again. it seems to idle smooth but high about 950RPM but if I ease into the throttle it might do it but not always. if I get on it and then hold it about 1500 to 2500 rpm it will do it as well.
the gentleman that I bought it from said that his shop replaced an injector and it was ok for a little while and then it came back again (it didn't do it when I test drove it.) I think it might be the tranny but I thought that some one who has delt with this before may be able to help me. |
if it helps, I changed the air fiter because it was half soaked with oil, cap, rotor, plugs and wires gapped to 0.35 but that didn't seem to help.
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well the only thing that comes to mind is the TPS may be out of wack, is the jeep throwing any codes?
-Kyle |
not that I can see or pull up but I don't have the proper scan tool.
Is the tps adjustable on these models? |
yes they are.
let me find a couple of good links for you -Kyle |
checking and adjusting the TPS
http://autorepair.about.com/library/faqs/bl232i.htm use this to check for codes. http://go.jeep-xj.info/HowtoECUcodes.htm -Kyle |
thank you Kyle I will try that tomorrow and get back to you I hope that is all it is!!
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well that wasn't it. thank you for the help. I guess I am going to have to take it to a shop to look it over.
thank you again!! Brandon |
Where all the injectors replaced?
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no just one.
I check them all hoping to find a bad one but they all where about 16.9-17.2 ohms. My manual says they should be between 3-6 ohms, but I don't belive that they all could be bad and still run (let alone good). so I just assumed that because the lowest setting on my meter was 200 ohms that I needed to get a different one or have someone else check them for me. |
ok guys got the problem fixed! all that was caused by the crank sensor! but I drove it around for about 30 min. and it didn't jerk again so I think I will be good.
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