some questions

stng87 · 03-11-2001, 01:50 AM

Ok I have just spent all afternoon trying to solve this problem. pulled the plugs and they are a little black and the very tip of the plug not the electrode, the metal part was white. new cap, rotor, wires, ignition module, plugs and gap good, all connections good. It just stumbles most noticably pulling hard at low rpm, and pulling hard at high rpm. Was suspecting the o2's dont want to buy them if they arent bad though. Can a tps effect driving conditions other than idle? What about the throttle air bypass?

03-11-2001, 05:30 AM

Whens the last time you changed your fuel filter?

------------------
Paxton Blown 87GT

stng87 · 03-11-2001, 11:11 AM

about a week ago for the fuel filter. Maybe its just clogged injectors? I put some cleaner in yesterday, but it gets nothing but 93 octane.

stng87 · 03-11-2001, 04:38 PM

WOW!just overflowing with knowledge here!

Doctor DeBo · 03-11-2001, 05:47 PM

Yes a bad TPS could do it,check the voltage with a meter,black grnd,green pos-should be in the 90s range.Also make sure all the sensors at the throttle body are clean.Its incredible what a little bit of dirt will do.If it was O2 sensors the check eng light would more than likely be on.If you can get a code scanner that would help,get one at Sears-they work.

Mr 5 0 · 03-11-2001, 05:47 PM

The TPS could be a factor but it could be a weak coil or a tired fuel pump, too.

Hard to diagnose from a distance; all we can do is offer suggestions as to the source of the problem. No magic bullets here, and sarcasm won't generate more responses, either; in fact, just the opposite.

[This message has been edited by Mr 5 0 (edited 03-11-2001).]

stng87 · 03-11-2001, 08:38 PM

sarcasm??? what are you talking about?

03-11-2001, 01:50 AM	#1
stng87 Registered Member Join Date: Sep 2000 Location: southern california Posts: 329	some questions Ok I have just spent all afternoon trying to solve this problem. pulled the plugs and they are a little black and the very tip of the plug not the electrode, the metal part was white. new cap, rotor, wires, ignition module, plugs and gap good, all connections good. It just stumbles most noticably pulling hard at low rpm, and pulling hard at high rpm. Was suspecting the o2's dont want to buy them if they arent bad though. Can a tps effect driving conditions other than idle? What about the throttle air bypass?

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03-11-2001, 05:30 AM	#2
Mustanguy Guest Posts: n/a	Whens the last time you changed your fuel filter? ------------------ Paxton Blown 87GT

03-11-2001, 11:11 AM	#3
stng87 Registered Member Join Date: Sep 2000 Location: southern california Posts: 329	about a week ago for the fuel filter. Maybe its just clogged injectors? I put some cleaner in yesterday, but it gets nothing but 93 octane.

03-11-2001, 04:38 PM	#4
stng87 Registered Member Join Date: Sep 2000 Location: southern california Posts: 329	WOW!just overflowing with knowledge here!

03-11-2001, 05:47 PM	#5
Doctor DeBo Registered Member Join Date: Feb 2000 Location: Newnan, GA, UnitedStates Posts: 83	Yes a bad TPS could do it,check the voltage with a meter,black grnd,green pos-should be in the 90s range.Also make sure all the sensors at the throttle body are clean.Its incredible what a little bit of dirt will do.If it was O2 sensors the check eng light would more than likely be on.If you can get a code scanner that would help,get one at Sears-they work.

03-11-2001, 05:47 PM	#6
Mr 5 0 Conservative Individualist Join Date: May 1997 Location: Wherever I need to be Posts: 7,487	The TPS could be a factor but it could be a weak coil or a tired fuel pump, too. Hard to diagnose from a distance; all we can do is offer suggestions as to the source of the problem. No magic bullets here, and sarcasm won't generate more responses, either; in fact, just the opposite. [This message has been edited by Mr 5 0 (edited 03-11-2001).]

03-11-2001, 08:38 PM	#7
stng87 Registered Member Join Date: Sep 2000 Location: southern california Posts: 329	sarcasm??? what are you talking about?