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Matt, Engineer
Category: Kia
Satisfied Customers: 20368
Experience:  Mechanical Engineer BEng Hons22 years experience in car engine industry, 10 years in formula 1
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Ok i have a 99 sportage an sometimes it will run an then it

Customer Question

ok i have a 99 sportage an sometimes it will run an then it wont
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Mechanic I'm going to connect you with knows all the tricks and shortcuts. What kind of car is it? Toyota, Honda, Ford, Chrysler, etc.
Customer: kia sportage
JA: Got it. What model and year?
Customer: 99
JA: Tell me a bit more about what's going on so he can help you best.
Customer: it wont stay running an sometimes it will
JA: Are you hoping to fix this yourself?
Customer: yes i love doing this the only way i can learn
JA: Great! What have you tried so far?
Customer: not sure what to try
JA: Is there anything else the Mechanic should be aware of about your Kia?
Customer: no
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Mechanic about your situation and then connect you two.
Submitted: 6 months ago.
Category: Kia
Expert:  Matt replied 6 months ago.
Hello This could be a wiring issue as things tend to expand when hot and its possible a poor or partial electrical connection is being pushed apart on one of the major sensors so check the connection plug and wiring to the following;Airflow meterCrank position sensorCam position sensorO2 sensorThrottle position sensor unplug each in turn and use some switch / contact cleaner spray on the pins to ensure its all grease / dirt free Also worth checking the connections to the fuel pump for the same reason - unplug each in turn and give them a good squirt of switch / contact cleaner - Not WD40 and also unplug and inspect the main power relays and fuses for signs of overheating or corroded terminals - so the ones for the ECU and the fuel pump And also unplug the wiring loom connections in the engine bay one at time and inspect for corroded or recessed pins. Check the resistance of the spark plug leads ( 13-15Kohm / metre) and replace if any doubt or high resistance - Also replace the spark plugs if any of them fail this checklist: Also its worth checking that the electric pump that feeds the injectors is working correctly, it should run for a few seconds then switch off when you first turn the ignition on. If the connections to this are corroded or damaged then the pump could stop at any time. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse, ideally measure the voltage at the pump and check its getting 12V
Expert:  Matt replied 6 months ago.
Hido you still need help?Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you

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