im still having problems with my TPS with the setting being at 4.92 volts and yes i know how to set it but the problem is that it was set at .99 volts when we put the engine in the car but now its at 4.92 volts. The IAC and the ACT sensors have been changed. The o2 sensor are almost new, but havent unplugged them yet to see if they are the problem. When i unplug the one of the sensor take the ECT for example the volts will come down to 4.91 volts and if i unplug another sensor it will come down another .01 volts. But it wont come dwon anywhere near .99 volts. i will try the O2 sensors and unplug them and see if helps or not.

Also I hear a high pitch noise like a leak somewhere. i dont think its a vaccum leak bc it goes away when the car warms up.

The last problem is the cold start problem still. When i start the car in the mornings it will sputter and die, but if i put foot on the gas it will sputter for about 10 seconds and then rev up and i have to keep the RPM's up to get the car warm but as soon as the car is warmed up it runs fine.

I have upgraded the fuel pump to a 155 and all the other mods are in my signature.

One of the problems i thought it could be is the Stock H-pipe i have on there bc i dont have any emission crap on my car except the h-pipe and the old engine i had the rings were going so oil was passing though and was coming out the tailpipes so i think the h-pipe might be clogged. Do you think this could be an answer to one of my problems?

please help

 

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what wires are you tapping into when measuring with the tool?

 

i guess you are talking about the tps and im tapping into the green wire

 

dude, i have had the same problems- it seems like every time you change a bad sensor it fixes something for a few miles and then it does the same kind of sh*t over and over again. im sorry i dont have a solution. i guess the only advice i have is to use a diagnostic tool and see if it throws out any codes. is the check engine light on???? i need to check my codes next cause i just made a $120 mistake by buying a new fuel pump i didnt need. dont make my mistake- just check the damn thing for codes

 

i guess you could at least change the tps since its cheap enough and you know its bad. i just bought one for like $30 at autozone the other day. mine didnt measure right either and i chaged it- now the voltage is normal. is the 4.92 volts with the throttle closed or at full throttle. also- are you using the proper setting on your multimeter ?? key on engine off??

 

yes i know how to check the tps and it is new too. its at 4.92 volts all the time and it never changes

 

you probally have a bad tps sensor. I have been having the same problem with my car. except for my problem was the idle. I have spent manya money on sensor trying to fix it. I cleaned and replaced lots of parts. and then one day its fixed. what it was after spending all the money(wasted money)... when it rained water got into the self test connector and made it run bad, after the problem went away I was washing my car and it came back, so i check out the wiring harness and there was water in the self test plug in thingy, I cleaned it out and fixed the problem. this may not be your problem, but I feel your pain on spending money on sensors.

 

my cold start problem i just fixed. It was my O2 sensors