1997 GMC Yukon Sport, 198,000 miles. How do I adjust the timing?
Dec 14, 2006 at 6:21 PM
97 GMC Yukon: How to adjust the timing
1997 GMC YUKON
TAYALEX1978
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Your cars PCM controls the timing for ignition and injectors. There is no adjustment required or allowed. Why do you need to adjust the timing. Is there something wrong that I can help with
Backyardmechanic :D
Backyardmechanic :D
Dec 15, 2006 at 7:12 AM
[quote="backyardmechanic"]Your cars PCM controls the timing for ignition and injectors. There is no adjustment required or allowed. Why do you need to adjust the timing. Is there something wrong that I can help with
Backyardmechanic :D[/quote
We initially took it to a shop to get the fuel pump repaired. We drove it in but had to tow it out. It wouldn't turn over at all. We replaced the fuel pump pressure regulaor, replaced all 4 O2 sensors, throttle positioning sensor, idle control sensor and cleaned the spark plugs. It turns over but seems to not be getting any fire. We were told that the timing was off. Could it be something else?
Backyardmechanic :D[/quote
We initially took it to a shop to get the fuel pump repaired. We drove it in but had to tow it out. It wouldn't turn over at all. We replaced the fuel pump pressure regulaor, replaced all 4 O2 sensors, throttle positioning sensor, idle control sensor and cleaned the spark plugs. It turns over but seems to not be getting any fire. We were told that the timing was off. Could it be something else?
Dec 15, 2006 at 8:42 AM
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[quote="tayalex1978"][quote:950f3d2590="backyardmechanic"]Your cars PCM controls the timing for ignition and injectors. There is no adjustment required or allowed. Why do you need to adjust the timing. Is there something wrong that I can help with
Backyardmechanic :D[/quote
We initially took it to a shop to get the fuel pump repaired. We drove it in but had to tow it out. It wouldn't turn over at all. We replaced the fuel pump pressure regulaor, replaced all 4 O2 sensors, throttle positioning sensor, idle control sensor and cleaned the spark plugs. It turns over but seems to not be getting any fire. We were told that the timing was off. Could it be something else?[/quote:950f3d2590]
If your not getting spark then there is a problem with the ignition system. If the timing is off then this would mean the timing chain has slipped and needs to be replaced. Even though the car has high mileage (chain has some wear) I would make sure the car is getting spark before assuming the timing is off. Check the simply things first before moving on to bigger ones. Hope this is some help BYK
Backyardmechanic :D[/quote
We initially took it to a shop to get the fuel pump repaired. We drove it in but had to tow it out. It wouldn't turn over at all. We replaced the fuel pump pressure regulaor, replaced all 4 O2 sensors, throttle positioning sensor, idle control sensor and cleaned the spark plugs. It turns over but seems to not be getting any fire. We were told that the timing was off. Could it be something else?[/quote:950f3d2590]
If your not getting spark then there is a problem with the ignition system. If the timing is off then this would mean the timing chain has slipped and needs to be replaced. Even though the car has high mileage (chain has some wear) I would make sure the car is getting spark before assuming the timing is off. Check the simply things first before moving on to bigger ones. Hope this is some help BYK
Dec 15, 2006 at 4:32 PM