3.4l d.o.h.c
92_Lumina_Z34
11-21-2009, 07:02 PM
Engine backfires while turning over, but will not start.
Ran perfect a couple days ago.
Any input would be great.
Thanks in advance
Ran perfect a couple days ago.
Any input would be great.
Thanks in advance
danielsatur
11-21-2009, 07:20 PM
What Elements do you need for a fire?
Air, Fuel, Ignition, and Timing.
This is a 1992 with a OBD I system, so there's less codes.
The backfire tells us, that you do have some fuel, and fire.
Doe's this car have a MAF sensor?
Air, Fuel, Ignition, and Timing.
This is a 1992 with a OBD I system, so there's less codes.
The backfire tells us, that you do have some fuel, and fire.
Doe's this car have a MAF sensor?
92_Lumina_Z34
11-21-2009, 07:34 PM
This car does not have a MAF sensor
danielsatur
11-21-2009, 09:54 PM
1995 and newer have OBD II systems, these codes can help us troubleshoot.
Old School Troubleshooting -
1) How many miles are on this car?
2) How many miles are on the old plugs & wires?
Old School Troubleshooting -
1) How many miles are on this car?
2) How many miles are on the old plugs & wires?
92_Lumina_Z34
11-21-2009, 10:47 PM
1) Car has 142000 miles
2) Plugs and wires were changed about a month ago
Recently have done:
-timing belt (replace idler pulleys, tensioner, and hydraulic tensioner)
-replaced o-ring for distributor drive unit
-head gasket on rear bank
2) Plugs and wires were changed about a month ago
Recently have done:
-timing belt (replace idler pulleys, tensioner, and hydraulic tensioner)
-replaced o-ring for distributor drive unit
-head gasket on rear bank
Bearwulf
11-23-2009, 02:01 AM
Did problem start before or after changing timing belt? This car has the predecessor to the MAF which is the Intake Air temp. sensor.
92_Lumina_Z34
11-23-2009, 01:55 PM
Problem started 2 weeks after the belt was changed. Car ran perfect. shut it down, went to start it the next day and it wouldn't start
danielsatur
11-23-2009, 06:40 PM
It's all about timing!
1) Verify and check your timing.
A loose tensioner, could of caused the timing to jump a tooth.
http://www.automotiveforums.com/vbulletin/showthread.php?t=954555
1) Verify and check your timing.
A loose tensioner, could of caused the timing to jump a tooth.
http://www.automotiveforums.com/vbulletin/showthread.php?t=954555
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