Help! Limp MODE?

larks_keltcH · 10-07-2009, 11:27 AM

HI i have owned my 1991 toyota mr2 n/a 5spd for almost a year now. I have constantly worked on her and she is a great daily driver. Well i have noticed i have a steep power drop off around 4000rpm and i redline at 4800rpms. She has been running real rich and i can smell exhaust or somthing. this is leading to bad gas milage and if i giver full thorttle the gas gauge will drop. Also, i have been trying to fix a high idle since i bought her. Idle is around 1900 to 2000rpms. (this ranges)

IS it poss. that i am in Limp mode? or what? side note my temp senor just went out =(

SilkkTheShocker · 10-08-2009, 06:44 PM

most likely your throttle position is shot, happend to me try unplugging it and revving the throttle, as for the idle, theres a screw for that

larks_keltcH · 10-15-2009, 06:24 PM

I replaced my 02 sensor, which helped a little and unplugged and replugged my MAP sensor. MY idea is about 1100, alot better i think. i have replaced my TPS and tried unplugging it. I still got that fuel cut out at around 4200-4800 =(

SilkkTheShocker · 10-16-2009, 04:06 PM

did u have any trouble getting the bottom screw out of the tps, i cannot get it out its in such a bad place

larks_keltcH · 10-21-2009, 11:13 AM

yea. I have a s-screw driver type thing that I am able to use. Idle is 1100. But now if i just give it a toch of gas wants it hit about 1900 it starts to jump. i mean the idea starts going crazy and rising and droping from 1900 to 1000. But only if i give it that little bit of gas. If I give it just a little bit more it will go right through 1900 with no problem.

grjr · 10-21-2009, 03:55 PM

remove your air hose from the throttle body and check to see that the throttle body is clean and the throttle rotates smoothly by hand and by using the gas pedal

10-07-2009, 11:27 AM	#1 (permalink)
larks_keltcH No Skills Join Date: Oct 2009 Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	Help! Limp MODE? HI i have owned my 1991 toyota mr2 n/a 5spd for almost a year now. I have constantly worked on her and she is a great daily driver. Well i have noticed i have a steep power drop off around 4000rpm and i redline at 4800rpms. She has been running real rich and i can smell exhaust or somthing. this is leading to bad gas milage and if i giver full thorttle the gas gauge will drop. Also, i have been trying to fix a high idle since i bought her. Idle is around 1900 to 2000rpms. (this ranges) IS it poss. that i am in Limp mode? or what? side note my temp senor just went out =(

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10-08-2009, 06:44 PM	#2 (permalink)
SilkkTheShocker Mister 2 Join Date: Apr 2009 Location: Central Ohio Posts: 77 Thanks: 1 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	most likely your throttle position is shot, happend to me try unplugging it and revving the throttle, as for the idle, theres a screw for that

10-15-2009, 06:24 PM	#3 (permalink)
larks_keltcH No Skills Join Date: Oct 2009 Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	I replaced my 02 sensor, which helped a little and unplugged and replugged my MAP sensor. MY idea is about 1100, alot better i think. i have replaced my TPS and tried unplugging it. I still got that fuel cut out at around 4200-4800 =(

10-16-2009, 04:06 PM	#4 (permalink)
SilkkTheShocker Mister 2 Join Date: Apr 2009 Location: Central Ohio Posts: 77 Thanks: 1 Thanked 1 Time in 1 Post iTrader Rating: (1/100% )	did u have any trouble getting the bottom screw out of the tps, i cannot get it out its in such a bad place

10-21-2009, 11:13 AM	#5 (permalink)
larks_keltcH No Skills Join Date: Oct 2009 Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	yea. I have a s-screw driver type thing that I am able to use. Idle is 1100. But now if i just give it a toch of gas wants it hit about 1900 it starts to jump. i mean the idea starts going crazy and rising and droping from 1900 to 1000. But only if i give it that little bit of gas. If I give it just a little bit more it will go right through 1900 with no problem.

10-21-2009, 03:55 PM	#6 (permalink)
grjr No Skills Join Date: Jul 2009 Location: Bakersfield CA Posts: 22 Thanks: 1 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	remove your air hose from the throttle body and check to see that the throttle body is clean and the throttle rotates smoothly by hand and by using the gas pedal