20 Most Recent 1999 Jeep Grand Cherokee - Page 6 Questions & Answers

ECU TOPIC (swaps) why ask us? we can't see car, or see what drive line is there. nor VIN code.(telling same) why not ask JEEP.? amazing ? ever seen this? http://www.factorychryslerparts.com/productSearch.aspx?&ukey_make=1064&ukey_model=15529&ukey_trimlevel=0&ukey_modelRange=0&modelYear=1999&ukey_category=0&ukey_driveline=0&isOnSale=0&searchTerm= computer, ,that is the ECU, and is not the only computer. here are the ECU rules. (not full, only jeep knows all rules) it must have same base number. then needs to be programmed to match your cars, drive line and federal smog laws and year.) end story.

wow 3 posts and now 1996 is a 1999 so which is it? it was answsered in full your last post. and with FULL FSM book chapter on topic, for free posted over 300 times this. 2wd or 4wd? just grease, just under car. no dis-assembly?>? why not just RTM, read the manual chapter 0 here it is 301times 100% free,, amazing , no ? http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

most operators manuals have these points in the service section of the book

the airbag light coming on is telling you that a problem exists in the airbag system. you need it get it to a dealer or reputable garage and have the system checked. with the airbag system malfunctioning it is possible the airbag wont properly deploy in an accident or may deploy without warning

could be something as simple as a clogged fuel filter or the pump is not putting out the needed psi of fuel to the line. If it is running rough when you hold your foot down on the pedal then check to see if the line is clogged or water in it. There are a few places to start. I do believe its all electronically controlled so you cannot adjust the cable might look at the control module on the injection unit.


Joe

where are your hands?/ no idea at all what your are meissing with. no suction... is this a car? try telling the full story, type it in, with notepad an paste it here. if engine coolant thermostat? and not HVAC this stat on engine, opens by thermal action not suction. it opens near 180F. and regulates there, at that temperature.

Rebuilding them consists of new U joints and maybe balanced. If it was so loose the the u joints wallowed out the keepers, Then yes, they would also need replaced. Cut off and welded on. That isn't a common problem, but I have had to replace a few. Not just on jeeps.

If the oil pressure switch shows zero, how do you know its fine? If the oil level is correct in the engine, it may be a faulty wire / connection or it could be that the oil pump is failing

Sounds like a charging system problem and the alternator may not be working. The gauge light will come on if the charging gauge is showing low so you will look at the gauges. Have the battery and charging system tested

Jeep Grand Cherokee Service Repair Manual 1999 2000 2001 2002 2003 2004 for better result of your problem contact the reliable-store they have the best service manuals

P0753 is a 3rd-4th shift solenoid/relay circuit failure issue. Are you getting spark ? Does the tachometer register when cranking engine over ?

OBDII Code P0733 Jeep Gear Ratio Error In Third Gear HelpForCars net

bad news those is the main /cam sensor if fail hard, engine stalls, no spark which engine, 4.0liters? wrangle TJ chapter 21 (dtc pages) cam single dead or dropping out 1 to 10 times it does give early warnings. (can) check wires to it. chapter 8d free fsm TJ http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

All the computers in the car talk on a CAN Bus. One of the computers might be interfering with the others. +OR+ It happened to me, I had a bad ground. I grounded the computer directly to the battery and magically everything worked. I then had to go through the wiring to figure out which ground. In my case the one under the center console was loose. There is a connector under the dash that is more like a plug (it might look like a unused diagnostic port), if you pull the cap off, you will separate all the computers. With an oscilliscope or really good volt meter you can probe which of those pins is putting out noise. The connector is the CAN bus connector. If you have a good diagnostic tool, one that can talk to the other computers, not just pull codes from the engine computer, you can, with a wiring diagram, add one at a time until you find the culprit.