rb20det crappy idle ..backfiring into intake ?
-
preston240sx
- Posts: 562
- Joined: Mon Oct 04, 2004 9:53 pm
- Car: Nissan 240SX S13
rb20det crappy idle ..backfiring into intake ?
Ok so I just picked my car out of storage ive had this problem for a while looking for alittle help with the issure the car idles like crap have to keep my foot on and odd the gas to keep it going if it does idle on it own its crappy .when it goes to die and I hold the throttle with hand I can hear it back firing in the intake .. let me know what ya got thx
-
themadscientist
- Posts: 26254
- Joined: Tue Nov 12, 2002 3:30 pm
- Car: R32 GTR, DR30 RS Turbo, BRZ, Lunchbox, NSR50 Sportster 883 Iron
- Location: Staring down at you with disdain from the spooky mountaintop castle.
Re: rb20det crappy idle ..backfiring into intake ?
Well stop doing all that stuff. This isn't a 1974 pickup truck with a quadrajunk carb. 
If it ran fine when you parked it, my first thought would be change out the plugs. I had a Skyline that sat for a month and when I went to start it back up ran like a**.
Next would be listen to see if your fuel pump is humming happily. It might have gone bad, but I really expect it's the plugs.
If it ran fine when you parked it, my first thought would be change out the plugs. I had a Skyline that sat for a month and when I went to start it back up ran like a**.
Next would be listen to see if your fuel pump is humming happily. It might have gone bad, but I really expect it's the plugs.
Re: rb20det crappy idle ..backfiring into intake ?
If it's backfiring through the intake, it's generally not a good thing. Here's a good summary of things it could be:
Timing belt
Ignition timing (if you have a distributor)
Bent intake valves
Intake valves not sealing
Having the ignition sequence mixed up (such as: the spark for cylinder 1 is going to cylinder 2, 3, etc.)
Check the plug wires and make sure they go to the right cylinder. Check that the ignition timing is right. Inspect the belt. Then do a leak down test to test the valves (noted this one last because not everyone has a leak down tester).
Timing belt
Ignition timing (if you have a distributor)
Bent intake valves
Intake valves not sealing
Having the ignition sequence mixed up (such as: the spark for cylinder 1 is going to cylinder 2, 3, etc.)
Check the plug wires and make sure they go to the right cylinder. Check that the ignition timing is right. Inspect the belt. Then do a leak down test to test the valves (noted this one last because not everyone has a leak down tester).