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| 7M-GE Engine Technical Discussion Have a problem with your 7M-GE? Technical tip or trick? Post here. |
11-04-2009, 05:06 PM
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#1
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Junior Member
Level up: 35%, 65 Points needed |
Join Date: Jun 2009
Location: merrimack nh
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feels like a flat spot 2750-4000 rpm
has any one expirienced anything like this?
i have within the last 10k miles replaced the wires, cap and rotor, plugs 1k ago with toyota plugs, and coolant temp sensor
i have in addition checked the VAF meter, voltage sweep is smooth and steady... the air intake temp sensor is accurate as well....
no intake leaks
so... just curious if anyone has any idea
the car accelerates strong the just kind of "stops pulling" so hard between 3-4k then pulls again...is this normal of tha acis???
thanks in advance
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11-05-2009, 06:55 PM
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#2
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Supramania Regular
Points: 16,575, Level: 56 |
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Re: feels like a flat spot 2750-4000 rpm
make sure your ACIS is working properly
__________________
85 Supra - 7MGE
84 Supra - 2JZGE VVTi underway
91 Supra - Stock 7MGTE going in, JZA70 Auto
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11-05-2009, 07:00 PM
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#3
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THE DRIVELINE GUY
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Re: feels like a flat spot 2750-4000 rpm
maybe check fuel pressure. mine had a fpr that was not bad but not good ither, lol. kinda did same thing. make sure the fpd isnt leaking also if its the stock plastic one.... cant think of anything off top of my head other than that sorry
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=morning to do list=
1) shower
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3)make supra faster than the money it consumes!!!!
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11-05-2009, 10:03 PM
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#4
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Junior Member
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Join Date: Jun 2009
Location: merrimack nh
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Re: feels like a flat spot 2750-4000 rpm
so after looking into it more....
i determined that that acis is not working correctly.. as in there is no vacuum applied to the actuator when the car is driven...
so far, i know i have vacuum going to the vacuum reservoir .. and no vacuum coming from the solenoid
so i either have a bad solenoid or no signal going to the solenoid...
so, let me ask. is it possible to mix up the connectors.. for instance, will the acis solenoid connector connect to the egr solenoid ? and vice versa
i ask, because i had replaced the head gasket, i recal vaguely that there were different colors and i think i matched them up to the colors of the solenoids... can anyone speak to this?
furthermore, is it worth it just to replace the solenoid? common problem?
its so weird that i didnt catch on sooner as to the acis not working... i feel i have plenty of power low rpm.... curious as to how well it will pull after i fix it
thanks guys, sorry for the long brain fart of a post
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11-05-2009, 10:05 PM
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#5
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Junior Member
Level up: 35%, 65 Points needed |
Join Date: Jun 2009
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Re: feels like a flat spot 2750-4000 rpm
on a side note... i couldnt find anything in the tsrm for the acis... wtf?
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11-06-2009, 09:53 AM
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#6
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Supramania Regular
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Re: feels like a flat spot 2750-4000 rpm
http://www.supramania.com/forums/showthread.php?t=61090 here's how to fix it, it was in the stickies. Might be your vac lines reversed.
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11-06-2009, 02:53 PM
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#7
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Junior Member
Level up: 35%, 65 Points needed |
Join Date: Jun 2009
Location: merrimack nh
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Re: feels like a flat spot 2750-4000 rpm
all the vac lines are correct... i managed to pull the reservoir.. that was a nightmare...
bench tested the solenoid... it works....
so i go back to the connector, now that its accessible.. i have a 12 v feed... so now im going to check for a ground signal...
is there anything that would prevent the ecm to run the solenoid? like another bad sensor or whatnot?
back to work
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11-06-2009, 03:18 PM
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#8
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Junior Member
Level up: 35%, 65 Points needed |
Join Date: Jun 2009
Location: merrimack nh
Posts: 81
Spent time on board: 2 Days and 3:16:48 Hours
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Re: feels like a flat spot 2750-4000 rpm
so i am going to say its a bad solenoid.... even though it works now...
i have signal and voltage at the solenoid... but had no vacuum at the actuator before...
i am assuming that knocking around the solenoid a bit happened to free it up... good for now... but annoying..
thanks for listening and your input
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