scott and barb
03-04-2005, 11:55 PM
Sounds like a plug wire...
"Tom Sweazy" <sweazy@optonline.net> wrote in message
news:UnUKd.913$bL7.498@fe10.lga...
> Hi Guylaine, Wolfgang,
>
> I tried the 1/4 tank injector cleaner technique and the stuttering has
> gone away! I filled the tank and still no stuttering after about 50
> miles from the original treatment. This will certainly save me $$$$ if
> it holds. I had forgotten to mention I had tried a can of BG44K in a
> full tank a few weeks ago but that had made no difference. Perhaps it
> would have if I tried the 1/4 tank method. I used 'Valvoline SynPower
> Fuel Injector Cleaner" this time around. I still plan to clean the
> throttle body.
> Thanks again both of you for taking the time to respond to my question.
> Tony
>
>
> Guylaine J. Parisien wrote:
>
> > Use injector cleaner.
> > Run the fuel tank down to 1/8-to-1/4 full and pour the whole bottle of
> > injector cleaner into the gas tank, then drive it as far as you dare
before
> > you run out of gas, [don't ever run out of gas with fuel injectors] then
> > fill the tank, run it to 1/8 and do it again, then add cleaner to each
tank
> > full after that according to directions on the bottle. You can't put an
> > overdose in the tank and leave it as it will melt the seals in the fuel
> > system if left concentrated for too long.
> > This is what my toyota dealer does to first time problems, then if this
> > doesn't fix it, it's remove and replace. Fuel injectors on stationary
diesel
> > engines etc are re-buildable but I don't know about the Toyota units. I
> > doubt it as the service manual only refers to replacement. The manual
shows
> > the test procedure for volume flow and leakage. ( less than one drop of
fuel
> > per minute) Remove the injector from the engine, jury rig a hose to the
> > input [use fuel from the pressure regulator] jumper the fuel pump so it
runs
> > without the engine running. . Both the cold start and cylinder injectors
> > should be the same leakage. They also specify flow, put power to the
> > injector and see a nice conical spay pattern as well as measure the
output..
> > 40-50 cc / 15 seconds, variation less than 6cc across all injectors.
don't
> > leave the injector powered longer than needed.
> >
> >
> > "Tom Sweazy" <sweazy@optonline.net> wrote in message
> > news:L7BJd.563$nZ.22@fe10.lga...
> >
> >>Wolfgang wrote:
> >>
> >>>To test ya need special equipment -- You can pull them all and ship to
> >
> > RC
> >
> >>>Engineering or DOA racing (if I recall) to have then cleaned and
> >
> > calibrated.
> >
> >>>
> >>>"Tom Sweazy" <sweazy@optonline.net> wrote in message
> >>>news:MwTId.1518$Yv3.523@fe11.lga...
> >>>
> >>>
> >>>>Guylaine J. Parisien wrote:
> >>>>
> >>>>
> >>>>
> >>>>>you probably have a leaky fuel injector.. have them tested.
> >>>>>
> >>>>>
> >>>>>"Tom Sweazy" <sweazy@optonline.net> wrote in message
> >>>>>news:x9kId.2624$K42.1102@fe10.lga...
> >>>>>
> >>>>>
> >>>>>
> >>>>>>1988 SR-5 Pickup, 22-RE 4 Cyl. 2.4 liter Engine, 5-Speed Manual,
fuel
> >>>>>>injection. No AC.
> >>>>>>
> >>>>>>Problem: Engine stutters for a couple of seconds when I step on the
> >>>>>>gas, but ONLY when accelerating AFTER I was traveling along and
> >
> > allowed
> >
> >>>>>>the engine to brake the truck. This is the case when I eventually
> >
> > come
> >
> >>>>>>to a stop and also if I never fully stop. After the stuttering, it
> >
> > runs
> >
> >>>>>>great even when under heavy load like traveling up a steep hill.
> >>>>>>
> >>>>>>Here's the odd part: If I take it out of gear just BEFORE letting
the
> >>>>>>engine slow the truck, and allow the RPM's to drop to idle, then put
> >
> > it
> >
> >>>>>>in gear and accelerate...no stuttering!
> >>>>>>
> >>>>>>It's as if something were loading with fuel when I let off on the
gas
> >>>>>>pedal and allow the engine to brake, resulting in a too rich mix
when
> >
> > I
> >
> >>>>>>accelerate again.
> >>>>>>
> >>>>>>I put in a new timing chain last year and the engine ran fine for
> >>>>>>several months.
> >>>>>>
> >>>>>>Items replaced with no effect on stuttering:
> >>>>>>Spark plugs, ignition wires, distributor cap, rotor, PCV valve, air
> >>>>>>filter, fuel filter. I checked fairly rigorously for vacuum leaks.
> >>>>>>
> >>>>>>Any Ideas?
> >>>>>>Thanks
> >>>>>>Tony
> >>>>>
> >>>>>
> >>>>>
> >>>>Hi Guylaine,
> >>>>Thanks for the tip. Wolfgang suggested cleaning the throttle body,
> >
> > which
> >
> >>>>I will pursue. When you say that an injector may be leaking, does
that
> >>>>imply it allows fuel to pass through when it should be shut off during
> >>>>deceleration? If so, that would seem consistent with the symptoms. Do
> >
> > you
> >
> >>>>know what's involved in checking for a leaky injector? Does it require
> >>>>special equipment?
> >>>>Tony
> >>>
> >>>
> >>>
> >>Hi Wolfgang,
> >>Thanks for the info on the injectors. As soon as the weather breaks and
> >>I can schedule some downtime I'll most likely go for it. By the way,
> >>when the engine is warm and I'm idling, sometimes there's a very low
> >>level pop/skip/stutter and most people don't even notice it. The tach
> >>barely shows a drop in RPM. Could this be related to the injector
> >>problem addressed earlier? Some folks have said it's normal for a 4
> >>cylinder engine. I don't recall it doing that before but maybe I never
> >>listened close enough.
> >>Tony
> >
> >
> >
"Tom Sweazy" <sweazy@optonline.net> wrote in message
news:UnUKd.913$bL7.498@fe10.lga...
> Hi Guylaine, Wolfgang,
>
> I tried the 1/4 tank injector cleaner technique and the stuttering has
> gone away! I filled the tank and still no stuttering after about 50
> miles from the original treatment. This will certainly save me $$$$ if
> it holds. I had forgotten to mention I had tried a can of BG44K in a
> full tank a few weeks ago but that had made no difference. Perhaps it
> would have if I tried the 1/4 tank method. I used 'Valvoline SynPower
> Fuel Injector Cleaner" this time around. I still plan to clean the
> throttle body.
> Thanks again both of you for taking the time to respond to my question.
> Tony
>
>
> Guylaine J. Parisien wrote:
>
> > Use injector cleaner.
> > Run the fuel tank down to 1/8-to-1/4 full and pour the whole bottle of
> > injector cleaner into the gas tank, then drive it as far as you dare
before
> > you run out of gas, [don't ever run out of gas with fuel injectors] then
> > fill the tank, run it to 1/8 and do it again, then add cleaner to each
tank
> > full after that according to directions on the bottle. You can't put an
> > overdose in the tank and leave it as it will melt the seals in the fuel
> > system if left concentrated for too long.
> > This is what my toyota dealer does to first time problems, then if this
> > doesn't fix it, it's remove and replace. Fuel injectors on stationary
diesel
> > engines etc are re-buildable but I don't know about the Toyota units. I
> > doubt it as the service manual only refers to replacement. The manual
shows
> > the test procedure for volume flow and leakage. ( less than one drop of
fuel
> > per minute) Remove the injector from the engine, jury rig a hose to the
> > input [use fuel from the pressure regulator] jumper the fuel pump so it
runs
> > without the engine running. . Both the cold start and cylinder injectors
> > should be the same leakage. They also specify flow, put power to the
> > injector and see a nice conical spay pattern as well as measure the
output..
> > 40-50 cc / 15 seconds, variation less than 6cc across all injectors.
don't
> > leave the injector powered longer than needed.
> >
> >
> > "Tom Sweazy" <sweazy@optonline.net> wrote in message
> > news:L7BJd.563$nZ.22@fe10.lga...
> >
> >>Wolfgang wrote:
> >>
> >>>To test ya need special equipment -- You can pull them all and ship to
> >
> > RC
> >
> >>>Engineering or DOA racing (if I recall) to have then cleaned and
> >
> > calibrated.
> >
> >>>
> >>>"Tom Sweazy" <sweazy@optonline.net> wrote in message
> >>>news:MwTId.1518$Yv3.523@fe11.lga...
> >>>
> >>>
> >>>>Guylaine J. Parisien wrote:
> >>>>
> >>>>
> >>>>
> >>>>>you probably have a leaky fuel injector.. have them tested.
> >>>>>
> >>>>>
> >>>>>"Tom Sweazy" <sweazy@optonline.net> wrote in message
> >>>>>news:x9kId.2624$K42.1102@fe10.lga...
> >>>>>
> >>>>>
> >>>>>
> >>>>>>1988 SR-5 Pickup, 22-RE 4 Cyl. 2.4 liter Engine, 5-Speed Manual,
fuel
> >>>>>>injection. No AC.
> >>>>>>
> >>>>>>Problem: Engine stutters for a couple of seconds when I step on the
> >>>>>>gas, but ONLY when accelerating AFTER I was traveling along and
> >
> > allowed
> >
> >>>>>>the engine to brake the truck. This is the case when I eventually
> >
> > come
> >
> >>>>>>to a stop and also if I never fully stop. After the stuttering, it
> >
> > runs
> >
> >>>>>>great even when under heavy load like traveling up a steep hill.
> >>>>>>
> >>>>>>Here's the odd part: If I take it out of gear just BEFORE letting
the
> >>>>>>engine slow the truck, and allow the RPM's to drop to idle, then put
> >
> > it
> >
> >>>>>>in gear and accelerate...no stuttering!
> >>>>>>
> >>>>>>It's as if something were loading with fuel when I let off on the
gas
> >>>>>>pedal and allow the engine to brake, resulting in a too rich mix
when
> >
> > I
> >
> >>>>>>accelerate again.
> >>>>>>
> >>>>>>I put in a new timing chain last year and the engine ran fine for
> >>>>>>several months.
> >>>>>>
> >>>>>>Items replaced with no effect on stuttering:
> >>>>>>Spark plugs, ignition wires, distributor cap, rotor, PCV valve, air
> >>>>>>filter, fuel filter. I checked fairly rigorously for vacuum leaks.
> >>>>>>
> >>>>>>Any Ideas?
> >>>>>>Thanks
> >>>>>>Tony
> >>>>>
> >>>>>
> >>>>>
> >>>>Hi Guylaine,
> >>>>Thanks for the tip. Wolfgang suggested cleaning the throttle body,
> >
> > which
> >
> >>>>I will pursue. When you say that an injector may be leaking, does
that
> >>>>imply it allows fuel to pass through when it should be shut off during
> >>>>deceleration? If so, that would seem consistent with the symptoms. Do
> >
> > you
> >
> >>>>know what's involved in checking for a leaky injector? Does it require
> >>>>special equipment?
> >>>>Tony
> >>>
> >>>
> >>>
> >>Hi Wolfgang,
> >>Thanks for the info on the injectors. As soon as the weather breaks and
> >>I can schedule some downtime I'll most likely go for it. By the way,
> >>when the engine is warm and I'm idling, sometimes there's a very low
> >>level pop/skip/stutter and most people don't even notice it. The tach
> >>barely shows a drop in RPM. Could this be related to the injector
> >>problem addressed earlier? Some folks have said it's normal for a 4
> >>cylinder engine. I don't recall it doing that before but maybe I never
> >>listened close enough.
> >>Tony
> >
> >
> >