7mgte stumble HELP - Page 4

ccguy · 12-05-2012, 11:20 PM

well the plug wires did not shock me so not the plug wires.

i am looking to see if i can find that faq but no luck yet

cre · 12-05-2012, 11:45 PM

http://www.supramania.com/forums/sho...ND...-crispics

ccguy · 12-05-2012, 11:56 PM

opened up the igniter and the ground is good and all is clean inside. the alum where the rubber gasket is is corroded but the ground is clean. i am going to extra ground the igniter to the body

ccguy · 12-06-2012, 12:06 AM

just ran a ground just like the faq. so we will see. thanks for the link and all of the help...this will be fixed tonight so i will be checking the computer ever so often to see if anything shows up on the forum. other than that i will be out working on the truck

ccguy · 12-06-2012, 12:45 AM

i installed a 20 ohm resistor and used a 25 ohm rheostat to make the voltage divider so i could adjust the volts going to the ecu from the hac sensor plug.
the idle changes as i change the volts from 2.8 to 3.8.
seems that when i turn it towards 2.8v the stumble is worse and when i turn it up towards 3.8 it is less noticiable but still there.
SO i am thinking it is something to do with the fuel injection for sure.
the tps readings at the ecu plugs (with it unplugged) are out of spec when the hac is plugged in and when the hac is unplugged it is perfect as it is at the tps.
so ......... and it runs better without the hac plugged in.
i have swapped out the tps and reset it in the past with a new one form az. it acts the same if i use either of the 2 tps sensors i have.

ccguy · 12-06-2012, 01:40 AM

-ok so i just checked the tps at the ecu with it running.
-vta at idle is .48 volts
-the stumble starts at .74 volts. (also at 2500 rpm)
-once the stumble starts if i press down on the petal it increases in volts to the ecu up to ~3.7v.
-so i am back to thinking it is a boost/egr/vac leak or something like that.
when the throttle is depressed past the .74 v quickly to say 1.2v it revs up like no problem or stumble.
then when the rpms are still up if i rev it again it will rev like a normal engine. i can hear the bov once i let off of the petal and the throttle body is closed.
i plugged in my spare cps and pulled the fuel pump fuse. turned the ign on and put a spark plug in the end of the #1 plug wire and grounded it to the body. as i turned the spare cps gear the plug would spark the same time the injector would click/fire. so i know my wiring and ecu are seeing the cps signal and telling the injectors to fire and the coil as well.....

cre · 12-06-2012, 06:14 AM

Quote:

Originally Posted by ccguy

as i turned the spare cps gear the plug would spark the same time the injector would click/fire. so i know my wiring and ecu are seeing the cps signal and telling the injectors to fire and the coil as well.....

I hope it's just not coming across clearly, but the spark plug shouldn't be firing when the injector is open.... Not on the same cylinder anyway.

ccguy · 12-31-2012, 01:57 PM

yea i hear you correct on the ign/injector timing. was a long night.
i plan on starting to work on it again here in a few weeks. i just needed a little break from pounding my head. thanks for the replys and if anyone has any suggestions they would be appreciated.

cre · 12-31-2012, 11:37 PM

I understand having to take a break. I've got to drop the engine out of my MR-2 to work on some stuff but I dislocated a carpal bone in my wrist this summer and can't afford the surgery so working on my car's rather tough. I'm probably going to be retiring from the site soon.

ccguy · 01-05-2013, 01:48 AM

that is a bummer. bodys are like cars, it really sucks when they dont work right or break.
hope you dont leave too soon....for my sake.

12-05-2012, 11:20 PM	#31
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	well the plug wires did not shock me so not the plug wires. i am looking to see if i can find that faq but no luck yet __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

12-05-2012, 11:45 PM	#32
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	http://www.supramania.com/forums/sho...ND...-crispics __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-05-2012, 11:56 PM	#33
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	opened up the igniter and the ground is good and all is clean inside. the alum where the rubber gasket is is corroded but the ground is clean. i am going to extra ground the igniter to the body __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

12-06-2012, 12:06 AM	#34
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	just ran a ground just like the faq. so we will see. thanks for the link and all of the help...this will be fixed tonight so i will be checking the computer ever so often to see if anything shows up on the forum. other than that i will be out working on the truck __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

12-06-2012, 12:45 AM	#35
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	i installed a 20 ohm resistor and used a 25 ohm rheostat to make the voltage divider so i could adjust the volts going to the ecu from the hac sensor plug. the idle changes as i change the volts from 2.8 to 3.8. seems that when i turn it towards 2.8v the stumble is worse and when i turn it up towards 3.8 it is less noticiable but still there. SO i am thinking it is something to do with the fuel injection for sure. the tps readings at the ecu plugs (with it unplugged) are out of spec when the hac is plugged in and when the hac is unplugged it is perfect as it is at the tps. so ......... and it runs better without the hac plugged in. i have swapped out the tps and reset it in the past with a new one form az. it acts the same if i use either of the 2 tps sensors i have. __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

12-06-2012, 01:40 AM	#36
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	-ok so i just checked the tps at the ecu with it running. -vta at idle is .48 volts -the stumble starts at .74 volts. (also at 2500 rpm) -once the stumble starts if i press down on the petal it increases in volts to the ecu up to ~3.7v. -so i am back to thinking it is a boost/egr/vac leak or something like that. when the throttle is depressed past the .74 v quickly to say 1.2v it revs up like no problem or stumble. then when the rpms are still up if i rev it again it will rev like a normal engine. i can hear the bov once i let off of the petal and the throttle body is closed. i plugged in my spare cps and pulled the fuel pump fuse. turned the ign on and put a spark plug in the end of the #1 plug wire and grounded it to the body. as i turned the spare cps gear the plug would spark the same time the injector would click/fire. so i know my wiring and ecu are seeing the cps signal and telling the injectors to fire and the coil as well..... __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

12-31-2012, 01:57 PM	#38
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	yea i hear you correct on the ign/injector timing. was a long night. i plan on starting to work on it again here in a few weeks. i just needed a little break from pounding my head. thanks for the replys and if anyone has any suggestions they would be appreciated. __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

12-31-2012, 11:37 PM	#39
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I understand having to take a break. I've got to drop the engine out of my MR-2 to work on some stuff but I dislocated a carpal bone in my wrist this summer and can't afford the surgery so working on my car's rather tough. I'm probably going to be retiring from the site soon. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

01-05-2013, 01:48 AM	#40
ccguy 3" Exhaust Join Date: Jun 2012 Location: az Posts: 50	that is a bummer. bodys are like cars, it really sucks when they dont work right or break. hope you dont leave too soon....for my sake. __________________ 1980 toyota 4x4 truck 1987 7mgte motor, 3" exhaust, water to air intercooler. 4.88s locked, dual cases, lift.....

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