The RED CAR?
It's not lost 12vdc, power., to EFI,
rotor ,cap, ok? plugs gapped at 0.028" never at .045 as they come from maker? never surface fire plugs, never 2J or 3J or 4J plugs ,ever.?
if the engine is healthy good compression and spark tips look ok, no oil or green AF contam, then its fueling or a sick ECU.
Ever check caps in the ECU for leaking or cracks? or Rubycon name? on side.?
power in spurts?, so, is it bogging in spurts, or misfiring. bogging is gentle ,misfire is violent.
which car Red or Blue? or white. I guess RED.
if 2 door Red does this , the ground behind the left rear tail light needs checking. fuel pump ground.
http://www.fixkick.com/power-index.html
diagnosis...???
id need more about the jerking, more information.
when you get the jerking, does moving the throttle fast change it.? in Any way?
Do the spark plug tips look odd?
Is it really a BOG, or is it really MISFIRE, (this is the key fact)
Jerks>
( fuel pressure loss, is a very unique feel, its like a slow, loss in power. the pressure drops slow. but if its spark related, its INSTANT, loss of power. for 1 hit of one cylinder or all 4.
Misfire, it's heard, and felt. or seen at idle , by looking at engine shake.
when it does jerk, a fast right foot change the length of the jerk ,or ends it or no change?
i dont think it's a bad engine. (runs ok most time, so is ok) (this assumes the crank pulley nut is at 94ft/lbs, if not all is lost. anything possible , symptom wise is not.
i think it's bad spark or fueling.
The ECU is not showing errors, so I think that the CMP and spark read back is good, it will report 1 misfire in 10. DTC, 41/42's
How slow can you go and get the jerk, does it ever happen, in neutral. does engine ever try to stall,? or close.
ON flat ground jerks?
or going down hill ever?
uphills, yes.
keep in mind a bad ECU can cause 3 major things fail at once, spark/inject/fuel pump. one or all. lost on the fly.
Usually if the ECU messes up. the 12 flashing cadence, breaks step. its halts mid stride., this is the ECU rebooting, fast.
and the Corner big cap, is top , offender. in fact some are vibration sensitive, and short randomly. (PRE 96s, only)
on more test.
i have connected a timing light to a spark plug wire.
then taped it to the windshield. (in one case , i removed the hood of car, (yes, motivated)
and then taped the trigger, closed, the strobe is flashing on the glass, left to right away from my eyes. I love Duct tape too...
i drive.
car misfires. i see my lamp (strobelamp) never drops cadence. or I do.? Not is lost fuel, does drop is bad spark.
i can repeat this on all 4 cylinders.
Q2: You're not running those, 3 way plant-able rotors from china , are you?
the above test , supplants the 1996 white cars, OBD2 misfire detection, the other 2 are OBD1, and cant report misfire at all.
there are other DIY test, one guy sprays water on the spark wires (only), if it misfires. they are bad. get NGK wires, they will pass the water test.
It's not lost 12vdc, power., to EFI,
rotor ,cap, ok? plugs gapped at 0.028" never at .045 as they come from maker? never surface fire plugs, never 2J or 3J or 4J plugs ,ever.?
if the engine is healthy good compression and spark tips look ok, no oil or green AF contam, then its fueling or a sick ECU.
Ever check caps in the ECU for leaking or cracks? or Rubycon name? on side.?
power in spurts?, so, is it bogging in spurts, or misfiring. bogging is gentle ,misfire is violent.
which car Red or Blue? or white. I guess RED.
if 2 door Red does this , the ground behind the left rear tail light needs checking. fuel pump ground.
http://www.fixkick.com/power-index.html
diagnosis...???
id need more about the jerking, more information.
when you get the jerking, does moving the throttle fast change it.? in Any way?
Do the spark plug tips look odd?
Is it really a BOG, or is it really MISFIRE, (this is the key fact)
Jerks>
( fuel pressure loss, is a very unique feel, its like a slow, loss in power. the pressure drops slow. but if its spark related, its INSTANT, loss of power. for 1 hit of one cylinder or all 4.
Misfire, it's heard, and felt. or seen at idle , by looking at engine shake.
when it does jerk, a fast right foot change the length of the jerk ,or ends it or no change?
i dont think it's a bad engine. (runs ok most time, so is ok) (this assumes the crank pulley nut is at 94ft/lbs, if not all is lost. anything possible , symptom wise is not.
i think it's bad spark or fueling.
The ECU is not showing errors, so I think that the CMP and spark read back is good, it will report 1 misfire in 10. DTC, 41/42's
How slow can you go and get the jerk, does it ever happen, in neutral. does engine ever try to stall,? or close.
ON flat ground jerks?
or going down hill ever?
uphills, yes.
keep in mind a bad ECU can cause 3 major things fail at once, spark/inject/fuel pump. one or all. lost on the fly.
Usually if the ECU messes up. the 12 flashing cadence, breaks step. its halts mid stride., this is the ECU rebooting, fast.
and the Corner big cap, is top , offender. in fact some are vibration sensitive, and short randomly. (PRE 96s, only)
on more test.
i have connected a timing light to a spark plug wire.
then taped it to the windshield. (in one case , i removed the hood of car, (yes, motivated)
and then taped the trigger, closed, the strobe is flashing on the glass, left to right away from my eyes. I love Duct tape too...
i drive.
car misfires. i see my lamp (strobelamp) never drops cadence. or I do.? Not is lost fuel, does drop is bad spark.
i can repeat this on all 4 cylinders.
Q2: You're not running those, 3 way plant-able rotors from china , are you?
the above test , supplants the 1996 white cars, OBD2 misfire detection, the other 2 are OBD1, and cant report misfire at all.
there are other DIY test, one guy sprays water on the spark wires (only), if it misfires. they are bad. get NGK wires, they will pass the water test.
http://www.fixkick.com