throttle lag?

gizmo83 · 07-27-2002, 12:06 AM

I've got a problem with lag here. i have a stock 2.3L.... when i start it in the morning (when its cold) it runs and idles smothly, no lag. once i run it for about 15-30 minutes it starts idling alittle funky (drops to like 400 rpm then revs to about 2,000 and stays for a few seconds then starts all over again)... and when that starts doing that, when i'm at a dead stop and i go to take off, if the throttle isn't to the floor it lags badly. then off and on for the rest of the day it will lag and idle funky, then it'll be ok for a few minutes then lag again..... any ideas?

1hot5.0 · 07-27-2002, 12:16 AM

If you car is mass air, I would check the mass air sensor. Also, you might want to check your tps (throttle postition sensor) and fuel injectors to make sure they are clean.

gizmo83 · 07-27-2002, 01:28 AM

Quote:

Originally posted by 1hot5.0
If you car is mass air, I would check the mass air sensor. Also, you might want to check your tps (throttle postition sensor) and fuel injectors to make sure they are clean.

nope no mass air... and i ran a bottle of injector cleaner. i changed the end pice of the TPS (the part that the plug plugs onto).... seen no difference.

PKRWUD · 07-27-2002, 02:01 AM

It could be the MAP sensor.

Try running codes.

Take care,
~Chris

gizmo83 · 07-27-2002, 02:21 AM

Quote:

Originally posted by PKRWUD
It could be the MAP sensor.

Try running codes.

Take care,
~Chris

i've changed the MAP sensor too... still have the problem. i'll try running the codes.

Fostang · 07-27-2002, 10:46 AM

no mass air = no Map he he hee

But a Bap.

Just had to say something

Agent_4573 · 07-27-2002, 11:49 AM

If there's no map sensor how can you change it?

PKRWUD · 07-27-2002, 12:47 PM

Quote:

Originally posted by Fostang
no mass air = no Map he he hee

But a Bap. Just had to say something

I'm afraid you have that backwards. Mass Air systems use a BAP sensor, while Speed Density systems use a MAP sensor.

Take care,
~Chris

Fostang · 07-27-2002, 08:38 PM

He he hee your right. LMAO

gizmo83 · 07-27-2002, 09:15 PM

ok guys i've ran the codes... heres what i've got...

23
83
84

KOEO EEC codes that is.

what is and where would i find the ECA, EGRC, and EGRV?

PKRWUD · 07-27-2002, 11:50 PM

You need to replace your TPS (Throttle Position Sensor). Buy a new one, and install it carefully. Before you snug down the screws that hold it in place, attach a DMM pos. lead to a small safety pin piercing the Green wire, and the neg lead to ground. Turn the DMM on to DC volts on the 20 volt scale. Turn the key to ON, but do not try to start. Read the DMM. It should read no lower than .9 vdc, and no more than 1.1 vdc. If it is within this range, tighten down the screws that mount the TPS to the TB. When tight, check voltage again, and make sure it's within that range. Next, slowly open the throttle by hand to WOT. The gauge should increase smoothly as you do this. Check the voltage at WOT. It must be higher than 4.5 vdc. If it is, verify once again that the screws are tight. Remove the DMM and leads & safety pin. Disconnect the neg. cable from the battery, and then turn on the headlight switch for 5 minutes, shut the switch off, and reconnect the neg battery cable.

The EGRC & EGRV solenoids are mounted on the back side of the passenger side strut tower, and will have two identical looking two wire electrical connectors plugged into the top of them. Check the connections, and make sure they are clean and tight. If you see any corrosion or damaged wires, fix them.

Take care,
~Chris

gizmo83 · 07-28-2002, 12:24 AM

Quote:

Originally posted by PKRWUD
You need to replace your TPS (Throttle Position Sensor). Buy a new one, and install it carefully. Before you snug down the screws that hold it in place, attach a DMM pos. lead to a small safety pin piercing the Green wire, and the neg lead to ground. Turn the DMM on to DC volts on the 20 volt scale. Turn the key to ON, but do not try to start. Read the DMM. It should read no lower than .9 vdc, and no more than 1.1 vdc. If it is within this range, tighten down the screws that mount the TPS to the TB. When tight, check voltage again, and make sure it's within that range. Next, slowly open the throttle by hand to WOT. The gauge should increase smoothly as you do this. Check the voltage at WOT. It must be higher than 4.5 vdc. If it is, verify once again that the screws are tight. Remove the DMM and leads & safety pin. Disconnect the neg. cable from the battery, and then turn on the headlight switch for 5 minutes, shut the switch off, and reconnect the neg battery cable.

The EGRC & EGRV solenoids are mounted on the back side of the passenger side strut tower, and will have two identical looking two wire electrical connectors plugged into the top of them. Check the connections, and make sure they are clean and tight. If you see any corrosion or damaged wires, fix them.

Take care,
~Chris

ok thanks for the help.... i guess my EGR isn't working becuz both EGRC & EGRV solenoids are missing. i found two identical plugs behind the passenger strut. but nothing to hook them to. ill pick those up at a junkyard for a few bucks along with a TPS useless a new one is cheap.

07-27-2002, 12:06 AM	#1
gizmo83 Registered Member Join Date: Jul 2002 Posts: 62	throttle lag? I've got a problem with lag here. i have a stock 2.3L.... when i start it in the morning (when its cold) it runs and idles smothly, no lag. once i run it for about 15-30 minutes it starts idling alittle funky (drops to like 400 rpm then revs to about 2,000 and stays for a few seconds then starts all over again)... and when that starts doing that, when i'm at a dead stop and i go to take off, if the throttle isn't to the floor it lags badly. then off and on for the rest of the day it will lag and idle funky, then it'll be ok for a few minutes then lag again..... any ideas?

07-27-2002, 12:16 AM	#2
1hot5.0 Registered Member Join Date: Mar 2002 Location: Arizona Posts: 172	If you car is mass air, I would check the mass air sensor. Also, you might want to check your tps (throttle postition sensor) and fuel injectors to make sure they are clean. __________________ 91 Mustang LX 5.0 Convertible AOD Mdifications: K&N filter, Mac Catback, BBK aluminum u/d pulleys.

07-27-2002, 02:01 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It could be the MAP sensor. Try running codes. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

07-27-2002, 10:46 AM	#6
Fostang Registered Member Join Date: Feb 2001 Location: Stockton, Ca Posts: 599	no mass air = no Map he he hee But a Bap. Just had to say something __________________ 67' Fastback-Supercharged 4.6 DOHC Cobra, T-56, 8.8 more to come. 67' Coupe-EFI, AOD, 8.8 90 Gt-Supercharged,MAF,TB,1.7's ripper, bassani x, 3.55's, 01' cobras, headers. 89'GT-Supercharged,Heads,Cam,Intake,TB,MAF,power pipe,headers,offroad exhaust,black bullits.

07-27-2002, 11:49 AM	#7
Agent_4573 Registered Member Join Date: May 2002 Location: New Jersey Posts: 375	If there's no map sensor how can you change it? __________________ '89 LX 5.0, off-road h pipe, flowmaster muffs, underdrive pulleys, rebuilt WC T-5, King Cobra Clutch, 65mm throttle body, Explorer Upper/GT40 lower, Lakewood Rear Lift Bars. 76mm C&L Mass air w/ inlet pipe, Twisted wedge heads w/ stage 2 port,polish, MAC equal length shorties, Billet AFPR, 255LPH fuel pump, fresh low end w/ 10.5:1 compression. If anyone ever wants to go to Raceway Park in Englishtown New Jersey, give me a shout. RICER HATERS CLUB MEMBER 87! www.ricehatersclub.com

07-27-2002, 08:38 PM	#9
Fostang Registered Member Join Date: Feb 2001 Location: Stockton, Ca Posts: 599	He he hee your right. LMAO __________________ 67' Fastback-Supercharged 4.6 DOHC Cobra, T-56, 8.8 more to come. 67' Coupe-EFI, AOD, 8.8 90 Gt-Supercharged,MAF,TB,1.7's ripper, bassani x, 3.55's, 01' cobras, headers. 89'GT-Supercharged,Heads,Cam,Intake,TB,MAF,power pipe,headers,offroad exhaust,black bullits.

07-27-2002, 09:15 PM	#10
gizmo83 Registered Member Join Date: Jul 2002 Posts: 62	ok guys i've ran the codes... heres what i've got... 23 83 84 KOEO EEC codes that is. what is and where would i find the ECA, EGRC, and EGRV?

07-27-2002, 11:50 PM	#11
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You need to replace your TPS (Throttle Position Sensor). Buy a new one, and install it carefully. Before you snug down the screws that hold it in place, attach a DMM pos. lead to a small safety pin piercing the Green wire, and the neg lead to ground. Turn the DMM on to DC volts on the 20 volt scale. Turn the key to ON, but do not try to start. Read the DMM. It should read no lower than .9 vdc, and no more than 1.1 vdc. If it is within this range, tighten down the screws that mount the TPS to the TB. When tight, check voltage again, and make sure it's within that range. Next, slowly open the throttle by hand to WOT. The gauge should increase smoothly as you do this. Check the voltage at WOT. It must be higher than 4.5 vdc. If it is, verify once again that the screws are tight. Remove the DMM and leads & safety pin. Disconnect the neg. cable from the battery, and then turn on the headlight switch for 5 minutes, shut the switch off, and reconnect the neg battery cable. The EGRC & EGRV solenoids are mounted on the back side of the passenger side strut tower, and will have two identical looking two wire electrical connectors plugged into the top of them. Check the connections, and make sure they are clean and tight. If you see any corrosion or damaged wires, fix them. Take care, ~Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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