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1994 Acura Legend Car dies at half a tank

Tiny
MICKEYTL
  • MEMBER
  • 1994 ACURA LEGEND
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 195,000 MILES
I've got a 94 Legend Coupe and for some unknown reason the car keeps dieing when the fuel guage reaches half way and the fuel light doesn't even lit. I know that there is still gas in the tank as well. It starts to die almost everytime only when I come to a complete stop at street lights. But, it always starts right back up and drives normal. I had the fuel pump, fuel sending unit and main relay replace and fuel injectors clean within the last 2 years. Would you know what the problem could be? Let me know.
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Friday, September 12th, 2008 AT 12:19 PM

8 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi mickeytl,

Thank you for thre donation.

Your problem seems to be associated with the idling speed. What is the normal idling speed after warming up?

I would suggest cleaning the throttle body, EACV and readjusting the idling speed.
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Friday, September 12th, 2008 AT 8:31 PM
Tiny
MICKEYTL
  • MEMBER
  • 15 POSTS
How would I go about finding out the normal idling speed after warm up and what is the EACV? Also, how much would labor cost be to do this repair? Let me know. Thanks.

Ming
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Saturday, September 13th, 2008 AT 12:18 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Ming,

You can try adjusting the idling speed first.

IDLE SPEED & MIXTURE
Idle Speed
1. Operate engine until cooling fan comes on. Remove cap from 2-pin connector, located near under- hood relay box. Connect a tachometer to single-Blue wire in 2-pin connector. Check base idle speed with M/T in Neutral (A/T in "N" or "P") and all accessories, including cooling fan, off. Idle speed should be as specified. See IDLE SPEED SPECIFICATIONS table.
2. Connect jumper wire at ignition timing adjusting connector. See Fig. 1 . Check Yellow LED on ECM (M/T) or PCM (A/T), located under passenger seat.
3. If LED is off, idle is okay. If LED is blinking, turn idle screw 1/4 turn clockwise. If LED is on steady, turn idle screw 1/4 turn counterclockwise. See Fig. 2 .
4. After turning idle screw 1/4 turn, wait 30 seconds for LED to go out. If LED does not go out, repeat 1/4 turn (in same direction) and wait 30 seconds, as necessary, until LED goes out.


https://www.2carpros.com/forum/automotive_pictures/192750_SCS94Legend_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_IdleAdjust4Legend_1.jpg



IDLE SPEED SPECIFICATIONS
Fig. 4: Adjusting Idle Screw Courtesy of AMERICAN HONDA MOTOR CO., INC. Idle Mixture IDLE CO LEVEL

NOTE: On engines with less than 310 miles, Yellow LED may glow even if idle is okay. DO NOT adjust idle screw on these vehicles.
Application RPM Coupe & GS Sedan
A/T (1) 580-680
M/T 630-730
Sedan "L" & LS
A/T (1) 550-650
M/T 600-700
(1) Automatic transmission in Neutral or Park.
NOTE: Idle mixture adjustment is not part of normal tune-up procedure and should not be performed unless mixture control unit is replaced or vehicle fails emissions testing. For idle CO level, see IDLE CO LEVEL table. Application CO Level Legend 0.1%
Page 1 of 1 ADJUSTMENTS -1994 Acura Legend L 9/13/2008

The EAVC is attached to the throttle body and to clean it, you can spray carb cleaner into the throttle body with the throttle valve opened.
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Saturday, September 13th, 2008 AT 6:44 AM
Tiny
MICKEYTL
  • MEMBER
  • 15 POSTS
Okay. Thanks for your information. I will continue with the process and see what the outcome is. I will inform you about the repair.
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Saturday, September 13th, 2008 AT 10:51 AM
Tiny
MICKEYTL
  • MEMBER
  • 15 POSTS
Me and my uncle did the process that you've explained to us.

1) We checked for any vacuum leaks, there is none whatsoever.

2) We adjusted the idle speed at the EACV based your instruction. The idel speed is set at rpm as of right now.

3) We clean the throttle body by spraying carburetor spray on the inside of the throttle body. The throttle plate was open and not closed. Hopefully that's what it should be. Most cars have a closed throttle plate.

I filled the gas tank on full and was able to drive an additiional 50 miles before it reach to half a tank, then it died again at a stop light. From there on, it dies almost everytime I come to a complete stop when the rpm drops below 500-600 rpm. Sometimes if I brake very slowly then it will stay above the 600 rpm and not die.

Can you help me again on this problem. Let me know.
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Wednesday, September 24th, 2008 AT 11:39 AM
Tiny
KHLOW2008
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Hi Ming,

When vehicle rpm drops to 600, try adjusting the rpm to 700.
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Thursday, September 25th, 2008 AT 9:41 AM
Tiny
MICKEYTL
  • MEMBER
  • 15 POSTS
I went ahead and adjusted the idle speed to 700 rpm, but it's still having the same issue. Do you think the problem would be the throttle body since the throttle plate is wide open when the car is parked? Let me know. Thanks.
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Tuesday, October 7th, 2008 AT 1:40 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Ming,

The throtle valve should be almost closed when accelerator is not depressed.

However an open throttle valve would make the idling high instead of low.

Since yo mentioned there is no problem when at full tank, I would suggest checking the fuel pump. It might have leakages at the hoses and connetions. You need to remove the fuel pump to check it.
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Tuesday, October 7th, 2008 AT 2:12 PM

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