Check Engine Light

92GT · 11-08-2003, 10:43 PM

Something odd has been happening that has me stumped. My check engine light comes on(when I am on the gas) randomly during 2500 rpm and 4000 rpm and it will go out as soon as I let off the gas. I know there are things that can cause the light to come on for short periods of time, but repeatedly and only when I am on the gas? I just changed the oil yesterday and it started last night and has been doing it ever since. Any suggestions would be appreciated..

Musclestang721 · 11-08-2003, 11:27 PM

checked your oil level yet.> could be short maybe..?

Hammered · 11-09-2003, 09:49 AM

i would look toward the O2 sensors due to the increased flow during throttle....one may be going bad...

rudestang · 11-09-2003, 01:30 PM

check out your vaccume lines... could have knocked one off changing oil...

good luck,

-Larry

92GT · 11-09-2003, 04:41 PM

Thanks for the suggestions, the oil level looks good, all the vacumm lines are ok and I am going to check the o2 sensors.

**12second5.0** · 11-09-2003, 07:16 PM

The complaint you have described sounds like an EGR and EVP sensor(on top of EGR).Pretty common to see.

92GT · 11-20-2003, 11:02 AM

So I went and pulled the codes and it came back as the TPS. I am going to replace it and I had a few questions. Do I need to disconnect the battery? Will the TPS require tuning after its on? Last, I wont burn as much gas now right?

dcm4136 · 11-20-2003, 02:51 PM

Have you set your TPS voltage since you put on your new t-body. Maybe you don't need to replace it, just need to set it. I would try this first as it means you won't have to buy new parts.

If you have never adjusted your TPS before This article on www.50tech.com explains how to do it.

92GT · 11-21-2003, 03:01 PM

Cool, thanks for the article

dcm4136 · 11-21-2003, 04:17 PM

No worries man. Glad I could help.

92GT · 11-21-2003, 04:51 PM

Can anyone suggest a good digital mutli-meter? I went to radio shack and they had like 10 different ones but none looked liked what I need.

dcm4136 · 11-21-2003, 04:58 PM

I just went to advance auto parts and picked up one for like 20 bucks.

fadlan12 · 11-28-2003, 11:57 PM

Quote:

Originally posted by 92GT
So I went and pulled the codes and it came back as the TPS. I am going to replace it and I had a few questions. Do I need to disconnect the battery? Will the TPS require tuning after its on? Last, I wont burn as much gas now right?

i have a 91 HB GT, where do you plug in a code reader or where do you pull codes from?

dcm4136 · 11-29-2003, 12:05 AM

There is a Jack on the driver side of your engine bay near the back that you plug the code reader into.

fadlan12 · 11-29-2003, 12:20 AM

Quote:

Originally posted by dcm4136
There is a Jack on the driver side of your engine bay near the back that you plug the code reader into.

does it say EEC test?

dcm4136 · 11-29-2003, 12:00 PM

Not that I remember. If you look at the plugs on the code reader they match up to the plugs on the port.

92GT · 12-05-2003, 06:37 PM

Quote:

does it say EEC test?

Yes, just pull the black cover off the plugs and plug them into the scanner.

Now on to my problem

code 13: RPM out of specifaction during normal idle operation or
D.C. motor does not follow dashpot.

What does that mean and what can be done to fix it?

**bighoss88lx** · 12-05-2003, 10:54 PM

Either your warm idle is too high or too low.

11-08-2003, 10:43 PM	#1
92GT Registered User Join Date: Aug 2003 Location: San Antonio Posts: 107 Trader Rating: (0)	Check Engine Light Something odd has been happening that has me stumped. My check engine light comes on(when I am on the gas) randomly during 2500 rpm and 4000 rpm and it will go out as soon as I let off the gas. I know there are things that can cause the light to come on for short periods of time, but repeatedly and only when I am on the gas? I just changed the oil yesterday and it started last night and has been doing it ever since. Any suggestions would be appreciated.. __________________

11-08-2003, 11:27 PM	#2
Musclestang721 MODIFIED Join Date: Jun 2003 Location: ATX/DFW Posts: 1,474 Trader Rating: (0)	checked your oil level yet.> could be short maybe..? __________________ 00 White Wingless 5speed- Modified MAC CAI, Spintech Dual Side exit exhaust, Prokit, 99 GT Rear Swaybar, AGX 5 way Adj., FRPP Clutch, MM Firewall Adjuster, MM Clutch Quadrant, ASP U/D Pullies,MGW Short Shifter, MGW Billet A/C knobs, MGW Locking Fuel Door, Upgraded Seats, Custom Interior Paint, Interior LED Setup, MM C/C Plates, MM STB, Cobra Brakes, Sequential Turn Signals, Saleen Front Facia, Stalker Hood, Sonic Blue DD Bullitts.

11-09-2003, 01:30 PM	#4
rudestang Registered User Join Date: Jun 2003 Location: San Antonio Posts: 102 Trader Rating: (0)	check out your vaccume lines... could have knocked one off changing oil... good luck, -Larry __________________ a few bolt ons and Lot's of juice! 97 v-6 running 12.4's

11-09-2003, 07:16 PM	#6
12second5.0 Check ya later! Join Date: Jun 2003 Location: Marion,Texas Posts: 8,605 Trader Rating: (0)	The complaint you have described sounds like an EGR and EVP sensor(on top of EGR).Pretty common to see. __________________

11-20-2003, 11:02 AM	#7
92GT Registered User Join Date: Aug 2003 Location: San Antonio Posts: 107 Trader Rating: (0)	So I went and pulled the codes and it came back as the TPS. I am going to replace it and I had a few questions. Do I need to disconnect the battery? Will the TPS require tuning after its on? Last, I wont burn as much gas now right? __________________

11-09-2003, 09:49 AM	#3
Hammered "The Hitman" Join Date: Aug 2003 Location: Leavekawkbref! Posts: 3,416 Trader Rating: (0)	i would look toward the O2 sensors due to the increased flow during throttle....one may be going bad...

11-09-2003, 04:41 PM	#5
92GT Registered User Join Date: Aug 2003 Location: San Antonio Posts: 107 Trader Rating: (0)	Thanks for the suggestions, the oil level looks good, all the vacumm lines are ok and I am going to check the o2 sensors.

11-20-2003, 02:51 PM	#8
dcm4136 Ooh-Rah Marine Corps Join Date: Jun 2003 Posts: 1,166 Trader Rating: (0)	Have you set your TPS voltage since you put on your new t-body. Maybe you don't need to replace it, just need to set it. I would try this first as it means you won't have to buy new parts. If you have never adjusted your TPS before This article on www.50tech.com explains how to do it. __________________ 88 vert Be polite and professional, but have a plan to kill everyone you meet.

11-21-2003, 03:01 PM	#9
92GT Registered User Join Date: Aug 2003 Location: San Antonio Posts: 107 Trader Rating: (0)	Cool, thanks for the article

11-21-2003, 04:17 PM	#10
dcm4136 Ooh-Rah Marine Corps Join Date: Jun 2003 Posts: 1,166 Trader Rating: (0)	No worries man. Glad I could help. __________________ 88 vert Be polite and professional, but have a plan to kill everyone you meet.

11-21-2003, 04:51 PM	#11
92GT Registered User Join Date: Aug 2003 Location: San Antonio Posts: 107 Trader Rating: (0)	Can anyone suggest a good digital mutli-meter? I went to radio shack and they had like 10 different ones but none looked liked what I need.

11-21-2003, 04:58 PM	#12
dcm4136 Ooh-Rah Marine Corps Join Date: Jun 2003 Posts: 1,166 Trader Rating: (0)	I just went to advance auto parts and picked up one for like 20 bucks. __________________ 88 vert Be polite and professional, but have a plan to kill everyone you meet.

11-29-2003, 12:05 AM	#14
dcm4136 Ooh-Rah Marine Corps Join Date: Jun 2003 Posts: 1,166 Trader Rating: (0)	There is a Jack on the driver side of your engine bay near the back that you plug the code reader into. __________________ 88 vert Be polite and professional, but have a plan to kill everyone you meet.

11-29-2003, 12:00 PM	#16
dcm4136 Ooh-Rah Marine Corps Join Date: Jun 2003 Posts: 1,166 Trader Rating: (0)	Not that I remember. If you look at the plugs on the code reader they match up to the plugs on the port. __________________ 88 vert Be polite and professional, but have a plan to kill everyone you meet.

12-05-2003, 10:54 PM	#18
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,952 Trader Rating: (1)	Either your warm idle is too high or too low. __________________ 1988 Mustang LX

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