At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Could be timing problem , timing belt or chain . The spark isn't happen at the right time . What make , model , year vehicle ? Engine size. The coil fire's when turned on by the PCM/ECM - engine computer , PCM/ECM knows by input from the crankshaft position sensor .
Mountaineers are very notorious for poor Timing Chain Systems and it may have slipped a few degrees and this will cause the notorious backfires.
Replace the Timing Chain Guides and re-time it and it will solve the backfire and sluggishness
If your car is getting fuel, then the igniton system is faulty. Things to check or replace in the order that I would check them are here: They are the coil, igniton module, cam and crankshaft sensors, map sensor. Your car may be out of time due to a broken timing belt/chain, or it may have been loose and jumped a few teeth on their cogs. Check engine timing and condition of belt. These are not all of the igniton components, but the most common items that go bad. The rest of the components and sensors shouldn't cause your car not to start, but affect driveabiliy
The igniton system may be faulty. Things to check or replace in the order that I would check them are here: They are the coil, igniton module, cam and crankshaft sensors, map sensor. Your car may be out of time due to a broken timing belt/chain, or it may have been loose and jumped a few teeth on their cogs. Check engine timing and condition of belt. These are not all of the igniton components, but the most common items that go bad. The rest of the components and sensors shouldn't cause your car not to start, but affect driveabiliy.
Quick timing chain test is generally when the chain fails the engine will spin faster when cranking. You will also have extremely low compression in the cylinders. If it is the chain, after replacement, if it idles very rough, chances are you have bent a few valves.
You need fuel, air, and fire to start your vehicle. Make sure gas is getting to the engine and make sure it has spark to the engine. Check all your fuel components, fuses, relays, fuel reset if equipped. Did you replace anything else besides the coil? Plugs, wires, coil pack, distributor, rotor, cam sensor, crank sensor? Did you check your timing belt/chain? Let me know please.
×