20 Most Recent 1997 Jeep Wrangler - Page 4 Questions & Answers

no, there is no single tests. not in the least. the hardest question on earth. is really how to test a very complex computer. i guess you dont own a scan tool ? if you did you'd not need to ask this. ill answer this is 3 classes, (my bailiwick) owners:

1. the car runs perfectly , full MPG and no CEL lamp and passes smog.
2. and no DTC errors in memory or while running.
3. it works.

mech.101:

1. the CEL lamp glows key on, if not fix that first (fuse)
2. The scan tool works, plugged in, if not fix that next (fuses)
3. same as above owners class, if not? he, checks for DTC errors. and works those to there logical conclusions...
4. He checks that all PCM inputs called sensors read right. (looking)
5. he check that the injectors dont leak, or are dead.
6. he makes sure the PCM runs in closed loop at idle, and light flat cruise, if not , we fix that.
7. is the ECT reading, right, 180F+ or wrong, if wrong the thermostat is borked. or missing or. other reasons, the tests are easy. ask.
8. we last check fuel trim, LTFT , long term fuel trim to see if the TRIM is centered. near 0 to +5% if not we find the cause.
9. lots more , ill stop. fingers tired.

Pro test lab: like Cardone. they use major ATE test equipment to test the PCM and under stress ! click the engine control link here. http://www.cardone.com/tech-help/electronics tell me ? why not just work the symptoms. got symptoms? why not post them.? ask for help on how to do the tests.? why not do a full scan if the PCM using any OBD2 scan tool (USA answers, always) you never said.

In the Tank.

huh? there are 4 corners, what works and what dont. blinks and hazards. ????

What does mash down the clutch mean??? If you get a noise whenever you depress the clutch pedal it may be that the throwout bearing is gone.

Check clock spring.

the I6 it fell off>? do tell? ever try google , they made 5million I6's there is no shortage of examples, that is for sure. google it. that is free, i wont do it for free. you do. on my i6s there is sticker in the fan top shroud, clearly stating this did you look for that? some times its long ,ago damaged 97 is pretty old. here is the FREE FSM look it up, its there. http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

Should be a small hole in the backing plate so you can punch out the studs through the hole.

Your battery needs to be replaced, or the terminals need to be cleaned with baking soda and water ( 1/2 cup baking soda to 1 cup of water ) or a spray can of terminal spray from an automotive outlet. Graham

This code means that you have a problem with purge flow. This is a relatively difficult problem to diagnose and you should know that this type of problem can be challenging even for professionals with proper diagnostic tools. You know how a container of liquid can inflate itself if left in the sun? (like one of those plastic gas cans) Well the gas tank on your car would do the same thing if it wasn't vented. But the good ol' EPA doesn't want you venting gasoline fumes into the atmosphere so the vented fumes are filtered through a charcoal canister first. The gasoline molecules are trapped in the charcoal canister. While you are driving the vehicle at cruising speed, the purge valve is opened (by the car's computer) and allows your engine to suck in the fumes from the charcoal canister and burn them. That last bit is Purge Flow. Check your vacuum hoses and the hoses coming from the charcoal canister to the purge valve and from the purge valve to the intake. If it all looks solid, I'd suspect your purge valve is either stuck or broken mechanically. If it is stuck you might free it up by taking it off and cleaning it. There is a way to test it but involves electrical knowledge and skill and you may have to put your mouth on it. (I'm talking about blowing air into it wile jumping power and ground to it in a very small connector). Check that your intake is not clogged with carbon buildup where the purge valve connects. Some intakes have very small passages for purge flow that become clogged easily. In rare cases the charcoal canister gets clogged. My advice to novices is if you don't see anything obviously clogged or leaking, then just replace the purge valve. If that doesn't do it, take it to a good mechanic with ASE Certified Technicians.

you attempted to fool the PCM. ever check fuse FIRST>? all other non engine electrics all working, and dash warning lamps all on key on???????? The ASD, fuel and starter relays, do what? you left that out. ok battery is good. starter is good. the relay works but who controls the relay, well that is a chain of things ok see here http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service see wiring see starter page. 8w-11-7 the relay is not tested by jumpering 30 to 87 fuse 2 must be good the relay good. then (a voltmeter makes this childs play) the relay coil is grounded on one side. then the hot side goes to the clutch switch(m.t) or as the case may be, the A/T PRNDL switch. my wild guess is car is A/T and if yes page 8w-21-3 covers this the key switch sends 12v to starter relay coil and the PRNDL ground the starter relay coil at d13 ever wiggle the PRNDL by trying park or neutral to crank the N contacts are virgin still and may allow cranking if you 12vdc across the coil cranking the relay is BAD. D11 to D13 (any voltmeter works)

a fuse blows (correct size and not horn hacks) for only one reason the parts are shorted. the fuse prevented the FIRE. that is its function. an ammeter ffinds this fast. need a video?

its bad.

From my experience with my wife's 97 Wrangler look at the intake manifold for 2 vacuum lines. They will be just under the throttlebody One of them is broken or has come loose. We had this problem several times, idle high, running eratic, until I put a smaller rubber hose on the fitting. Has run good since.

huh

changing the belt on a craftman lt 1000