EGR Value

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Oct 16, 2000 | 06:02 PM

fordsrus

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Joined: Sep 2000

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From: KY

EGR Value

Hi! Have a 1989 F-150 4.9L. Has a miss to it when accelerating. If you unplug the green vacuum hose from the EGR value the miss will go away. And I replaced the EGR value. What could it be?

Oct 16, 2000 | 11:11 PM

PAUL_2

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Joined: Jul 1999

Posts: 3,172

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EGR Value

The device that controls the egr operation is the Egr Vacuum Regulator . Its mounted left rear on the engine , just below the valve cover . If its malfunctioning it will activate the egr when it shouldnt . Thats one possibility . Check all the vacuum lines to & from the egr also .

Oct 17, 2000 | 01:43 PM

fordsrus

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From: KY

EGR Value

[font size="1" color="#FF0000"]LAST EDITED ON 17-Oct-00 AT 02:44 PM (EST)[/font][p]I replaced the EVR (Exhaust Vacuum Regulator)today, the regulator that you were talking about. and it still misses. Vacuum lines are O.K. Could it be the TAB/TAD Solenoids next to the EVR?

Oct 20, 2000 | 02:36 PM

rlbertrand

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Joined: Aug 2000

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EGR Value

Oct 20, 2000 | 08:49 PM

warthog299

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EGR Value

I have the same problem with a 1985. I just unplugged the green vacuum line and my truck runs great. Don't worry about the stupid egr valve. Unplug it.

Oct 21, 2000 | 11:52 AM

fordmaniac21

Elder User

Joined: Sep 2000

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From: Golden ,CO USA

EGR Value

try replacing the MAP sensor. If this is bad it will cause the engine to miss at idle and under acceleration. If you cant fix it try getting a code scanner from the auto parts store th pull the trouble code. You can get one for 25-30 bucks.

Oct 30, 2000 | 06:45 PM

fordsrus

Thread Starter

Freshman User

Joined: Sep 2000

Posts: 42

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From: KY

EGR Value

Replaced MAP sensor toady and still misses. Took it to a scanner today and found no errors or codes. Replaced TAD and TAB. How do you test the fuel regulator, and fuel injectors?

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Oct 30, 2000 | 07:23 PM

hotrodford_88

Fleet Mechanic

Joined: Aug 2000

Posts: 1,504

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From: Texas

EGR Value

I had the same problem on mine when it had the 6 cylinder in it, and I never found that stupid miss, even after spending $1,000 trying to find it.

I finally took it to a shop, and they cleaned the injectors and that stopped most of it. Then took it to the muffler shop at the advice of the guy at the shop, and found that one of the cats was plugged solid. This is what was causing my miss, of course 6 months after fixing all of that, I got tired of the crappy gas mileage, and performed a heart transplant, and it has run better and gotten better fuel mileage ever since.

Of course, I was only getting 12-13 mpg, out of it constantly, now I get between 14-17 out of depending on where I get my gas.

1988 F-150 Custom to XLT Lariat conversion, 5.0 EFI (formerly 300 I6), 5-speed M5OD, 3.08 rear gears (will be upgraded to 3.55's), Summit headers, Flowmaster muffler W/ dual 3.5" tips 24" long.

Pioneer CD, AC, Tilt, Cruise, Mobile Radio, Lightbar (Force 4 LP6000), Federal Signal PA300 Siren W/100W Siren Speaker. Caution Customizing in progress, Watch for flying tools & Parts!