exhaust

mrnickleye · 02-28-2006, 10:18 PM

So it is likely an engine misfire problem. could be an intake leak, which dilutes the fuel mixture. Not so noticeable except at idle.

Could be a spark problem. Cap, rotor, wires, plugs. Usually more noticeable under a load (accelerating or mtn uphill.

I'd check/replace these items. They are cheap enough, and new/good ones will help keep you running better.

hangsupra · 02-28-2006, 11:36 PM

yeah.... u got it... check those point too... hope you come out with something..

supra_91 · 03-01-2006, 02:18 PM

everything is fine on my car, plugs, wires, alternator, everything. this just started to happen after i put my header on and got worse after i put in the test pipe

supra_91 · 03-01-2006, 02:19 PM

and yes it is an automatic

supra_91 · 03-01-2006, 11:05 PM

what about the bad gas mileage. before i put the header of i was getting 21mpg but right after i put on the header it dropped down to 11 and eventually got down to where it is now-5mpg. do i need to get a fuel controller or is there something else wrong

mrnickleye · 03-02-2006, 06:52 AM

That's weird !! gas mileage problem. It sure appears to be something other than just doing the header. Is the 02 sensor connected properly??
It is the main sensor for mpg.

supra_91 · 03-02-2006, 02:26 PM

the pacesetter header didn't have an O2 sensor mounting spot on the exhaust manifold, it was on the extension pipe. so i had to extend the wire. theirs nothing wrong with that is there?

i also noticed when i bolted the sensor into place it wasn't sticking into the pipe. do you get what i'm saying?

i also replaced the sensor last summer

j3pz · 03-03-2006, 11:04 PM

more than likely the gas mileage prob and the shaking are related. it doesnt make any sense that the exhaust would have done anything to the intake or fuel would it? i mean the motor would still burn the same amount and air and fuel right?

02-28-2006, 10:18 PM	#1
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	So it is likely an engine misfire problem. could be an intake leak, which dilutes the fuel mixture. Not so noticeable except at idle. Could be a spark problem. Cap, rotor, wires, plugs. Usually more noticeable under a load (accelerating or mtn uphill. I'd check/replace these items. They are cheap enough, and new/good ones will help keep you running better. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

03-01-2006, 02:18 PM	#3
supra_91 Lexus & 550's Join Date: Sep 2005 Location: Illinois Posts: 521	everything is fine on my car, plugs, wires, alternator, everything. this just started to happen after i put my header on and got worse after i put in the test pipe __________________ 91 N/A automatic supra;K&N FIPK;2.5" custom exhaust;no cat;pacesetter header;eibach springs;tokico "blues";MKIV TT rims

03-01-2006, 02:19 PM	#4
supra_91 Lexus & 550's Join Date: Sep 2005 Location: Illinois Posts: 521	and yes it is an automatic __________________ 91 N/A automatic supra;K&N FIPK;2.5" custom exhaust;no cat;pacesetter header;eibach springs;tokico "blues";MKIV TT rims

03-01-2006, 11:05 PM	#5
supra_91 Lexus & 550's Join Date: Sep 2005 Location: Illinois Posts: 521	what about the bad gas mileage. before i put the header of i was getting 21mpg but right after i put on the header it dropped down to 11 and eventually got down to where it is now-5mpg. do i need to get a fuel controller or is there something else wrong __________________ 91 N/A automatic supra;K&N FIPK;2.5" custom exhaust;no cat;pacesetter header;eibach springs;tokico "blues";MKIV TT rims

03-02-2006, 06:52 AM	#6
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	That's weird !! gas mileage problem. It sure appears to be something other than just doing the header. Is the 02 sensor connected properly?? It is the main sensor for mpg. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

02-28-2006, 11:36 PM	#2
hangsupra 12psi boost Join Date: Jan 2005 Location: 209 area in cali. Posts: 397	yeah.... u got it... check those point too... hope you come out with something..

03-02-2006, 02:26 PM	#7
supra_91 Lexus & 550's Join Date: Sep 2005 Location: Illinois Posts: 521	the pacesetter header didn't have an O2 sensor mounting spot on the exhaust manifold, it was on the extension pipe. so i had to extend the wire. theirs nothing wrong with that is there? i also noticed when i bolted the sensor into place it wasn't sticking into the pipe. do you get what i'm saying? i also replaced the sensor last summer __________________ 91 N/A automatic supra;K&N FIPK;2.5" custom exhaust;no cat;pacesetter header;eibach springs;tokico "blues";MKIV TT rims Last edited by supra_91; 03-02-2006 at 02:39 PM.

03-03-2006, 11:04 PM	#8
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,060	more than likely the gas mileage prob and the shaking are related. it doesnt make any sense that the exhaust would have done anything to the intake or fuel would it? i mean the motor would still burn the same amount and air and fuel right? __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat

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