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backyardmechanic
New User
May 20, 2012, 2:15 AM
Post #1 of 7
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1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation
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truck starts shuts off turns over the 2nd time and idles the idle is sometimes a severe shutter close to stall point but stays running ive adjust the cap and rotor on a whim ive adjusted the efi carb screw improves a little bit ive shecked my plug wires all have spark just put new plugs in and ive also adjusted the throttle positioning sensor still have severe throttle hesitation when the smallest amount of throttle is applied when throttle is applied motor shutters and wants to stall but comes back after 1 quarter applied throttle any info is help please and thank you
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 20, 2012, 5:26 AM
Post #2 of 7
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Re: 1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation
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With all due respect stop adjusting things you know nothing about as you are just making a possible fix that much harder,
T
_________________________________________
Long retired now
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Discretesignals
Veteran
/ Moderator
May 20, 2012, 9:22 AM
Post #4 of 7
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Re: 1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation
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Probably means the air bypass screw for setting min air rate.
Check engine light on?
Since we volunteer our time and knowledge, we ask for you to please follow up on your threads when a problem is resolved.
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nickwarner
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/ Moderator
May 20, 2012, 12:46 PM
Post #5 of 7
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Re: 1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation
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EFI carb screws have a very delicate procedure to adjust and can cause the issue you have if not done properly.
1. muffler belt must be at proper tension and timed to 13 degrees advance at 60 degrees celcius
2. blinker fluid reservoir must be within spec and quality fluid used(I prefer Dr. Snake brand for my truck)
3. with the engine at idle, use a left handed metric crescent wrench and tighten screw to 15 foot-meters
4. back off 1/4 turn
5. if this procedure is followed exactly you will get 50mpg and the truck will never break down again.
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nickwarner
Veteran
/ Moderator
May 21, 2012, 11:27 PM
Post #6 of 7
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Re: 1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation
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Its no fun to go fishing if there aren't any bites. Damn. Back to drinking for me.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 22, 2012, 5:48 AM
Post #7 of 7
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Re: 1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation
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LMAO Nick. If pic don't show I'll try again but who knows?
Tom
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| 1989 mazda b2600i 2.6 4 cyl loss of performence throttle hesitation |
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