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 2.6 Timing
#783362
01/25/07 07:39 PM
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Joined: Mar 2006
Posts: 64
OP
Getting the Wheeling Fever
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My Gen I is backfiring when I let off the gas at high speeds. It is also doing that "...wants to keep running" thing when you turn off the ignition. I have checked the timeing and it shows to be right on. What other things can I do to resolve these issues. Thanks guys.
1988 Raider, 2.6L (Weber carb, PaceSetter header, Centerforce D/F clutch, 5-Speed M/T, 33X12.50 Pro Comp M/T, 15X8 US Wheel 97 Series)
3" Body Lift
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 Re: 2.6 Timing
[Re: n2dp]
#783363
01/25/07 07:56 PM
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Joined: Aug 2004
Posts: 644
Rock Warrior
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Check the following.
High idle
Sticking throttle linkage
Vacuum leak
Pcv valve
Over the hill but still climbing.
88 Montero 2.6L auto, manual hubs, cooling fan conversion gps,recurved distributor,LSD Diff.
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Re: 2.6 Timing
[Re: n2dp]
#783364
01/25/07 08:02 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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Sounds like running rich. Possible causes: misadjusted float in the weber, or leaking float needle valve, letting fuel leak into the carb throat. Or, if the carb was installed without a fuel return line and pressure regulator between pump and carb, the pump may be overwhelming the needle valve, and flooding the carb that way.
Effects: combustion chambers get carboned up, and some of the deposits glow white hot, hot enough to ignite fuel without a spark, which is all you cut off with the ignition switch, so it "diesels" on. Backfire on closing throttle at speed with a leaky carb is the excess fuel igniting in the exhaust pipes/manifold/cat/muffler.
How is your fuel mileage? How does it run otherwise? Any smoke from exhaust at idle, and does it smell like gas? Don't huff too much, or you'll die...
Could also be grossly wrong timing. Any pinging on accel? Is accel more sluggish than normal?
Last edited by fasteddy; 01/25/07 08:03 PM.
Not responsible for advice not taken...
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Re: 2.6 Timing
[Re: conner]
#783365
01/25/07 08:10 PM
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Joined: Mar 2006
Posts: 64
OP
Getting the Wheeling Fever
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Could there be an issue with the fuel/air ratio on the Weber carb and would this cause these problems?
1988 Raider, 2.6L (Weber carb, PaceSetter header, Centerforce D/F clutch, 5-Speed M/T, 33X12.50 Pro Comp M/T, 15X8 US Wheel 97 Series)
3" Body Lift
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Re: 2.6 Timing
[Re: fasteddy]
#783366
01/25/07 08:32 PM
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Joined: Aug 2004
Posts: 644
Rock Warrior
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Ed: If it was carboned up and has a rich mixture, the rich mixture would actually help to cool the combustion chamber. Backfire from the exhaust and after-run sounds like a lean condition or high idle.
Conner
Over the hill but still climbing.
88 Montero 2.6L auto, manual hubs, cooling fan conversion gps,recurved distributor,LSD Diff.
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Re: 2.6 Timing
[Re: fasteddy]
#783367
01/25/07 08:40 PM
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Joined: Mar 2006
Posts: 64
OP
Getting the Wheeling Fever
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Sounds like running rich. Possible causes: misadjusted float in the weber, or leaking float needle valve, letting fuel leak into the carb throat. Or, if the carb was installed without a fuel return line and pressure regulator between pump and carb, the pump may be overwhelming the needle valve, and flooding the carb that way.
Effects: combustion chambers get carboned up, and some of the deposits glow white hot, hot enough to ignite fuel without a spark, which is all you cut off with the ignition switch, so it "diesels" on. Backfire on closing throttle at speed with a leaky carb is the excess fuel igniting in the exhaust pipes/manifold/cat/muffler.
How is your fuel mileage? How does it run otherwise? Any smoke from exhaust at idle, and does it smell like gas? Don't huff too much, or you'll die...
Could also be grossly wrong timing. Any pinging on accel? Is accel more sluggish than normal? It idles at about 800 RPM, there is no smoke, you did hit on the "no pressure regulator", I will have to wait until this evening to "smell" the exhaust. Both issues started on the way back from a 1200 mile trip 2 weeks ago. It was driven pretty hard (75-85 MPH) during the Interstate portion (about 900 of the miles).
1988 Raider, 2.6L (Weber carb, PaceSetter header, Centerforce D/F clutch, 5-Speed M/T, 33X12.50 Pro Comp M/T, 15X8 US Wheel 97 Series)
3" Body Lift
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Re: 2.6 Timing
[Re: n2dp]
#783368
01/25/07 08:51 PM
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Joined: Dec 2004
Posts: 314
Mudrunner
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I'm assuming you have the carter high volume electric fuel pump that came with the kit? I was reading (mainly from TEP) that a fuel pressure regulator shouldn't be used for this application. Is this true? I have the same symptoms...sometimes.
'88 Raider 2.6L - SW Hubs, Weber 32/36, Off-road Pkg - Dead
'88 Monty 2.7L - 5" Lift, Weber 38, 33's, Dual Fans, Dual bouncy (more goodies to install) - Still Kicking.
'03 Monty Sport - XLS, BFG A/T's - Dead
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Re: 2.6 Timing
[Re: shadowgear]
#783369
01/25/07 08:57 PM
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Joined: Mar 2006
Posts: 64
OP
Getting the Wheeling Fever
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Yes, it is the 70 GPH Carter.
1988 Raider, 2.6L (Weber carb, PaceSetter header, Centerforce D/F clutch, 5-Speed M/T, 33X12.50 Pro Comp M/T, 15X8 US Wheel 97 Series)
3" Body Lift
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