10-26-2017, 03:19 AM
TELL MORE.
tell how it drives in all gears, all hills./ flat ground, acceleration, tip in of throttle , bogs? (hot)
Hot it definitely runs better. Really in all gears and all it runs good as long as RPMs are high. 3k and above. If you take off slow it will run then bog then run then bog and then moving fast enough a rpm’s higher and will take off. Have to drive it like you stole it and really be in it to get down the road. Also pumping the throttle A LOT makes a difference, especially at lower rpms. If you leave your foot where its at or put it all way to floor it will continue to bog. Sounds like it is not firing at all. When you let off it will buck and fire it seems . this is when you really have to pump the throttle to get rpms high.
what is seen felt, heard ?
RPM’s will jump, will buck and fire for a second then sound like not firing at all motor just turning over. If hood open can hear it turning over through the intake.
Misfire is violent, heard and felt. and seen. (3 ways to know its there)
misfire is black smoke seen at tail pipe. (or red hot stinking(sniff sniff bad CAT, i bet yours is dead cat, no problems there if not melted)
Maybe a little black smoke but never a real noticeable amount. Also have never smelled or seen the cat getting super hot.
and smells of unburned fuel.
Defiantly smells gassie driving down the road or at idle.
Misfire is mostly bad spark, but not always, that is because any engine that is too rich will misfire, due to spark plug tips turned black in carbon, and carbon , is super conductor to 15,000 volt spark. carbpn shorts the plugs out. (ending spark)ever look at the plugs, and gap that to .028" see if any are BLACK?, if one is black then you lose, 1/4 your power (actual more)
I have pulled all plugs before and they seem to be fairly normal nice brown ish color.
there are vast symptoms as shop sees test driving any car.
heard, felt and seen. (yes even see the TACHO drop is big clue ) or engine seen to shake at idle, or gear shift handle shakes oddly driver, flat or up hills.
One thing that it typically does is idles very high 1400 give or take a few hundred if it will maintain an idle. If not it will bounce. Rev way up then fall 1600 down to 400 hundred shake and shudder a little then rev way back up and fall. Sometimes will almost die on the dip or will die on the dip.
keep in mine the mech must be smarter than the ECU, as it is brick dumb this year.
the engine has 4 cylinders, and only one injector
it fires in 1,3,4,2 order and repeats. it makes a sequential of Putts. in that order, and does not skip cylinders ever, if it does, heard/seen or felt that is what MISFIRE MEANS
it means one or more cylinders was dead at the spark instant, and most times repeats. All gas engines sound smooth and even clean putts, if not it's misfiring.
the is also called bad combustion.
key elements (EFI basics) are:
1: compression must be good 160psi not 80
2: the spark must be strong, timed right and gapped at .028"
3: the fuel mix must not be rich, too rich will cause too rich misfire, and bad combustion. 14.7 :1 is normal AFR if to rich now remove the 02 sensors ,like I showed above.
AFR ,means air fuel ratio,
I have a fairly good understanding of how an internal combustion engine works and feel that I’m fairly savvy with a wrench. I’ve done quite a bit of fixing on my truck and working on the farm. I wouldn’t consider it an individual cylinder. It either runs well and wants to build rpms and go or it is falling totally on its face. Best way I can describe it
it takes tools to fix or diagnose any car, made.
lacking ,this, all you can do , my guess is use spark tips reading checks. eyes on tips of plugs. (white/lt gray /tan, black, carbon /antifreeze soaked, broken damage there)
I really appreciate all the help with this! Hope I can get it going!
tell how it drives in all gears, all hills./ flat ground, acceleration, tip in of throttle , bogs? (hot)
Hot it definitely runs better. Really in all gears and all it runs good as long as RPMs are high. 3k and above. If you take off slow it will run then bog then run then bog and then moving fast enough a rpm’s higher and will take off. Have to drive it like you stole it and really be in it to get down the road. Also pumping the throttle A LOT makes a difference, especially at lower rpms. If you leave your foot where its at or put it all way to floor it will continue to bog. Sounds like it is not firing at all. When you let off it will buck and fire it seems . this is when you really have to pump the throttle to get rpms high.
what is seen felt, heard ?
RPM’s will jump, will buck and fire for a second then sound like not firing at all motor just turning over. If hood open can hear it turning over through the intake.
Misfire is violent, heard and felt. and seen. (3 ways to know its there)
misfire is black smoke seen at tail pipe. (or red hot stinking(sniff sniff bad CAT, i bet yours is dead cat, no problems there if not melted)
Maybe a little black smoke but never a real noticeable amount. Also have never smelled or seen the cat getting super hot.
and smells of unburned fuel.
Defiantly smells gassie driving down the road or at idle.
Misfire is mostly bad spark, but not always, that is because any engine that is too rich will misfire, due to spark plug tips turned black in carbon, and carbon , is super conductor to 15,000 volt spark. carbpn shorts the plugs out. (ending spark)ever look at the plugs, and gap that to .028" see if any are BLACK?, if one is black then you lose, 1/4 your power (actual more)
I have pulled all plugs before and they seem to be fairly normal nice brown ish color.
there are vast symptoms as shop sees test driving any car.
heard, felt and seen. (yes even see the TACHO drop is big clue ) or engine seen to shake at idle, or gear shift handle shakes oddly driver, flat or up hills.
One thing that it typically does is idles very high 1400 give or take a few hundred if it will maintain an idle. If not it will bounce. Rev way up then fall 1600 down to 400 hundred shake and shudder a little then rev way back up and fall. Sometimes will almost die on the dip or will die on the dip.
keep in mine the mech must be smarter than the ECU, as it is brick dumb this year.
the engine has 4 cylinders, and only one injector
it fires in 1,3,4,2 order and repeats. it makes a sequential of Putts. in that order, and does not skip cylinders ever, if it does, heard/seen or felt that is what MISFIRE MEANS
it means one or more cylinders was dead at the spark instant, and most times repeats. All gas engines sound smooth and even clean putts, if not it's misfiring.
the is also called bad combustion.
key elements (EFI basics) are:
1: compression must be good 160psi not 80
2: the spark must be strong, timed right and gapped at .028"
3: the fuel mix must not be rich, too rich will cause too rich misfire, and bad combustion. 14.7 :1 is normal AFR if to rich now remove the 02 sensors ,like I showed above.
AFR ,means air fuel ratio,
I have a fairly good understanding of how an internal combustion engine works and feel that I’m fairly savvy with a wrench. I’ve done quite a bit of fixing on my truck and working on the farm. I wouldn’t consider it an individual cylinder. It either runs well and wants to build rpms and go or it is falling totally on its face. Best way I can describe it
it takes tools to fix or diagnose any car, made.
lacking ,this, all you can do , my guess is use spark tips reading checks. eyes on tips of plugs. (white/lt gray /tan, black, carbon /antifreeze soaked, broken damage there)
I really appreciate all the help with this! Hope I can get it going!