car is running really funny...help please - Page 2

QWKSNKE · 08-09-2007, 10:58 AM

Have you adjusted the timing recently?

03slobra · 08-09-2007, 02:34 PM

I'm with lee it sounds like a timing or ignition problem.Does it do it only in 4th or when its under a load like maybe a plug or wire breaking down?

Italian LX · 08-09-2007, 02:50 PM

Quote:

Originally Posted by 03slobra

....or when its under a load like maybe a plug or wire breaking down?

Yeah, that would've been my next suggestion.

coupe · 08-09-2007, 03:33 PM

I doubt the thermostat is the problem...but it might have to do with the temperature of the car.

I've personally never had them go "out," but alot of folks have had TFI modules go bad and they are very heat-specific problems. That's the little box on the side of the distributor that plugs into the harness. That'd be my first guess.

Also, check your cap & rotor and make sure there is no water/moisture in there. Things go crazy if there's moisture in the cap.

The thing that strikes me as odd is the fact you said "teh car almost like vibrates" when it's acting up. Is it misfiring/sputtering sound out the exhaust? This can cause vibration/shaking.
Describe this a little more indepth please.

QWKSNKE · 08-09-2007, 05:49 PM

You could check the tfi but usually I think the car just shuts off when the tfi gets hot if its bad.

lxkid90 · 08-09-2007, 07:33 PM

its like a random cyl misfire...the car makes no power and hangs at rpms...it will stay at 2000rpms for a full second when its punched and just linger up...im trying the coolant temp sensor and the air intake temp sensor tommorow as well as the thermostat...the wires are good, plugs are good, cap and rotor are good. thanks for the help...oh it does it in almost every gear, 2nd, 3rd, 4th...doesnt matter but it pulls hard when its not up to temp and runs perfect...im leaning toward the coolant temp sensor...they can make a car do really funny things...(i work at an autopart store and no not a chain store, and actual one owner old school auto parts store)

EHardy1971 · 08-09-2007, 08:48 PM

have you checked your TPS voltage?,and is it running rich?,it's starting to sound like a sig return voltage problem,or possibly a bad MAP/BAP sensor!

Italian LX · 08-10-2007, 09:08 AM

Quote:

Originally Posted by lxkid90

...the wires are good, plugs are good, cap and rotor are good. thanks for the help...

Just want to be clear how you know your wires are "good." Have you changed them already or at least swapped them out with a known good set?

Craig K. · 08-10-2007, 10:16 AM

Could it be an O2 sensor?
Last time I did my clutch when removing the exhaust I had hit one of the sensors, this had cracked the sensor elimate, and the car ran very rough, and would not pull at all (when warm) when cool it ran fairly close to normal.

Does the 88-93 computers allow you to do a KOEO test? What about a engine run test when you jump the engine compartment plug?
This is how I was able to get the actual codes and determine it was the O2 sensor.

lxkid90 · 08-10-2007, 03:54 PM

Quote:

Originally Posted by Italian LX

Just want to be clear how you know your wires are "good." Have you changed them already or at least swapped them out with a known good set?

they have been changed...

08-09-2007, 10:58 AM	#11
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Have you adjusted the timing recently? __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

08-09-2007, 02:34 PM	#12
03slobra Senior Member Join Date: Nov 2006 Posts: 488	I'm with lee it sounds like a timing or ignition problem.Does it do it only in 4th or when its under a load like maybe a plug or wire breaking down? __________________ Preston 1947 mercury 2door coupe 331w/tko 600 project 2003 f350 5in lift 6.0 with upgraded stuff!!!

08-09-2007, 03:33 PM	#14
coupe Super Moderator Join Date: Dec 2004 Posts: 6,313	I doubt the thermostat is the problem...but it might have to do with the temperature of the car. I've personally never had them go "out," but alot of folks have had TFI modules go bad and they are very heat-specific problems. That's the little box on the side of the distributor that plugs into the harness. That'd be my first guess. Also, check your cap & rotor and make sure there is no water/moisture in there. Things go crazy if there's moisture in the cap. The thing that strikes me as odd is the fact you said "teh car almost like vibrates" when it's acting up. Is it misfiring/sputtering sound out the exhaust? This can cause vibration/shaking. Describe this a little more indepth please. __________________ " If you can't explain it simply, you don't understand it well enough. " - Albert Einstein

08-09-2007, 05:49 PM	#15
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	You could check the tfi but usually I think the car just shuts off when the tfi gets hot if its bad. __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

08-09-2007, 08:48 PM	#17
EHardy1971 Trunk Monkey Join Date: Jun 2007 Location: Home Posts: 5,708	have you checked your TPS voltage?,and is it running rich?,it's starting to sound like a sig return voltage problem,or possibly a bad MAP/BAP sensor! __________________ Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS

08-09-2007, 07:33 PM	#16
lxkid90 Junior Member Join Date: Jun 2007 Posts: 28	its like a random cyl misfire...the car makes no power and hangs at rpms...it will stay at 2000rpms for a full second when its punched and just linger up...im trying the coolant temp sensor and the air intake temp sensor tommorow as well as the thermostat...the wires are good, plugs are good, cap and rotor are good. thanks for the help...oh it does it in almost every gear, 2nd, 3rd, 4th...doesnt matter but it pulls hard when its not up to temp and runs perfect...im leaning toward the coolant temp sensor...they can make a car do really funny things...(i work at an autopart store and no not a chain store, and actual one owner old school auto parts store)

08-10-2007, 10:16 AM	#19
Craig K. Nothing new here Join Date: Dec 2004 Location: Senoia, GA Posts: 2,990	Could it be an O2 sensor? Last time I did my clutch when removing the exhaust I had hit one of the sensors, this had cracked the sensor elimate, and the car ran very rough, and would not pull at all (when warm) when cool it ran fairly close to normal. Does the 88-93 computers allow you to do a KOEO test? What about a engine run test when you jump the engine compartment plug? This is how I was able to get the actual codes and determine it was the O2 sensor. __________________ 1974 Triumph TR6 1985 Monte Carlo SS 1986 Mustang GT 2011 KIA Optima GTS