Dredded p0305 misfire
#11
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When i was under it looking at the trailer wiring i think i saw some sort of ground strap dangling, possibility ?
Btw its a 4 door.
I will test tomorrow and let you know.
Still not bad for $500
Btw its a 4 door.
I will test tomorrow and let you know.
Still not bad for $500
Good job! P0446 is an electrical problem for the EVAP vent valve. Possibly an open circuit in the valve itself, or the two wires that go to it. The valve is mounted to the frame crossmember, just aft of the rear axle. On a 4 door, you need to drop the spare tire. On a 2 door you can get right at it. Disconnect the electrical connector from the valve and check resistance with a DVOM between the two terminals on the valve. If it shows an open circuit, it needs replacement. Most auto parts stores either have it, or can get it.
#12
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Ground strap might go to the fuel filler neck. Pretty common for them to rust out and fall off. The crossmember is almost directly above the rear axle, and the solenoid is in the center of the vehicle.
#14
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Good job! P0446 is an electrical problem for the EVAP vent valve. Possibly an open circuit in the valve itself, or the two wires that go to it. The valve is mounted to the frame crossmember, just aft of the rear axle. On a 4 door, you need to drop the spare tire. On a 2 door you can get right at it. Disconnect the electrical connector from the valve and check resistance with a DVOM between the two terminals on the valve. If it shows an open circuit, it needs replacement. Most auto parts stores either have it, or can get it.
#15
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Ronkonkoma
#16
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Want to give a big thank you for all the help i got with my problems.
I now have the misfire gone and running smooth like i stated a few posts back.
The P0446 is taken care of thanks to Captains advice. I took off the evap valve tested it
and was good, gave it a little shake since this car sat for 2 years and stuff sticks.
Then cleaned the connector and contacts, put back together and no more code.
Thank you so much i highly appreciate it.
I now have the misfire gone and running smooth like i stated a few posts back.
The P0446 is taken care of thanks to Captains advice. I took off the evap valve tested it
and was good, gave it a little shake since this car sat for 2 years and stuff sticks.
Then cleaned the connector and contacts, put back together and no more code.
Thank you so much i highly appreciate it.
#17
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('97 LS baby Blazer, 4.3, 4wd, etc... 240K miles, original in family purchased... so known miles)
I don't have codes handy... but I'll get them Monday so we have more info. In the interim... been trowing money at the fire but not killing it.
Catching up... misfire hiccups... ranch... assumes mice chewed wires... (btw "nope" to all assumptions to follow, "yep" to all problems and symptoms unchanged)
So typical misfires, tach flutter, engine light... and flashing, etc... runs great at 85+... hates legal speeds and 2200-3000 rpm
New plugs and wires
Fuel pump in tanks failed... $$$$ ouch...
new cap and rotor (don't know if it was AC Delco or cheapo)
New MP improved version spider
New cam sensor
Next mechanic suggestion valve 5 blown and rebuild time... he must have a house payment due.
So that is where I am at the moment. And I have a torn thumb tendon and a new back and a new neck... so sadly I'm paying others to do most of the crap I should do... but can't.
More to come... Thanks!
-Big
I don't have codes handy... but I'll get them Monday so we have more info. In the interim... been trowing money at the fire but not killing it.
Catching up... misfire hiccups... ranch... assumes mice chewed wires... (btw "nope" to all assumptions to follow, "yep" to all problems and symptoms unchanged)
So typical misfires, tach flutter, engine light... and flashing, etc... runs great at 85+... hates legal speeds and 2200-3000 rpm
New plugs and wires
Fuel pump in tanks failed... $$$$ ouch...
new cap and rotor (don't know if it was AC Delco or cheapo)
New MP improved version spider
New cam sensor
Next mechanic suggestion valve 5 blown and rebuild time... he must have a house payment due.
So that is where I am at the moment. And I have a torn thumb tendon and a new back and a new neck... so sadly I'm paying others to do most of the crap I should do... but can't.
More to come... Thanks!
-Big
#18
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As you read I wen through everything. The misfire returned at random after this thread. Also due to health issuees i was not able to change spider. Weekly I would put quality injector cleaner in and have had no misfire for many months.
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