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(RESOLVED) Part or full throttle causes rpm to bounce @1500 RPM

manikbastrd

Well-known member
Joined
Nov 19, 2009
Messages
660
So I was driving down the street to the gas station and I did a quick brake boost, and all of the sudden I lost power. I can start and Idle the car just fine and I can get one initial rev out of the motor when I start it, but other than that I just get the engine revving up to about 1500-200 then dropping then back up then down again. I checked my codes in link and I get 0014 which is Throttle position circuit malfunction...Link says that I am still getting .51-5.0 volts from the Throttle Position Sensor, and that reads as 0%-100%.

I don't know where to start or what to do. I disconnected my TPS and got the same symptoms, but the trouble code only comes up sometimes. So, I am really not sure if this is related or not. I also know that I have a slightly leaky throttlebody, and have a new one on the way already.

Any advice is greatly appreciated!
Thanks in advance
-Manik
 
Last edited:

manikbastrd

Well-known member
Joined
Nov 19, 2009
Messages
660
So, I adjusted my TPS to .63V at closed position, and switched to my FIC 750CC injectors, and heard my ISC(I think) clicking at some point in there...Now it runs fine...Any ideas?
 

prove_it

Well-known member
Joined
Jul 3, 2008
Messages
4,201
Location
Sioux Falls, SD
You say you have link? Post a log. It will be way easier to see what's going on.
 

G

Staff member
Joined
Feb 24, 2004
Messages
8,896
Location
zompton
Wait? Brake boost with a 5 speed trans and awd vehicle?
 

BoostedAWD91

Well-known member
Joined
Mar 1, 2007
Messages
2,937
Location
Danville,Pa
I had the same thing happen to me once going to work. Whether or not it actually was what caused it or not, but my catch can was full and after i drained it out, it ran fine again. Maybe it vapor locked /ubbthreads/images/graemlins/dunno.gif Ill never know 100% for sure what it was, but it got me back on the road
 

MRmeeTooxD

Well-known member
Joined
Oct 26, 2013
Messages
124
Location
chicago, illinois
I have the same issue that just started with me. I turn her on boom start perfect, right after like maybe 3 seconds. There it goes, it goes down to 500rpm from 1500 an stays at 500. Like some hotrod at idle. I tried to adjust Biss screw. But didn't work an it just tries to stay on.... I'm still new at trouble shooting. /ubbthreads/images/graemlins/dunno.gif
 
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