1996 Ford E-Series Van HIGH IDLE

COUNTRY0966

MEMBER
1996 FORD E-SERIES VAN

Engine Performance problem
1996 Ford E-Series Van V8 Two Wheel Drive Automatic

Came up with a TPS DTC, put a new tps in and still have high idle. 38-39psi fuel pressure and nothing coming from pressure reg. With vacuum line off. IAC out of vehicle tested at 0.00 ohms and was fairly clean, thus cleaned it with throttle body spray and let dry an hour. EGR is moving freely but iI do hear a gurgling sound from the egr vacuum control motor/time delay switch. DPFE was.19 dcv with koeo. Applied vacuum to hi side and dcv's dropped to.11 but would not hold vacuum. Ref side was.19dcv and with vacuum had no change, no change in volts with van running at idle or with half open throttle, nor wot. Sprayed intake cleaner all around intake man. And throttle body and found no leaks, nor in any of the lines. Also tried raw propane from a unlit( of coarse) torch with no change. Timing is right on. No missing or wanting to stumble. Just high idle and when goosing throttle a lack of wanting to return to previous high idle. I am doing this all with a multi meter the caveman way. Lol. I am going to go with the DPFE valve this morning. Have I missed anything? Oh a new tranny was put in less then 500 miles ago. If you have any ideas PLEASE let me know. Thanx

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MERLIN2021

MECHANIC
17,250 POSTS

Check the throttle body and cable, remove the cable(s) both the throttle cable and the cruise control cable if it has one operate the throttle by hand, does the idle return to normal now? If yes one of the cables is sticking... What is the engine size? Also what code(s) did you get? There are several, and if we need to test it, I need the exact code.

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Friday, July 30th, 2010 AT 8:24 AM

COUNTRY0966

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2 POSTS

I did that the first thing, I have run into frayed excel. Cables before. I even backed the set screw out 4 turns and tried to hand turn butterfly back( lightly) with no effect. So I returned set screw to orig. Position.
Well it wasn't the DPFE either. It is still Idling way too high. I am wondering if that was an old code.
> With engine running I unplugged the Vac. Line to EGR and put a length of Vac. Line on EGR and applied vacuum. Idle dropped right down to about where it should be. So I guess I will throw a Vacuum Control Motor at it and hope it works. That control motor (or time delay switch) is the sensor that was gurgling when I turned Ignition off after running engine. Any feedback? Thanx

Will you trade me a Chevy for this F.O.R.D? Laughing hysterically! Thank you for your Help

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Friday, July 30th, 2010 AT 9:05 PM

MERLIN2021

MECHANIC
17,250 POSTS

New EVR may help try unplugging and blocking the vacuum lines.

This part regulates the egr. Test both EGR and EVR this way:
EGR Valve 1. Ensure all vacuum hoses are correctly routed and securely attached. Replace any crimped or broken hoses. Ensure there is less than one in. Hg vacuum to EGR valve at idle with engine at normal operating temperature. 2. Install tachometer. Disconnect Idle Air Control (IAC) wiring harness connector. Remove and plug vacuum hose at EGR valve. Start engine and allow to idle in Neutral. Note idle speed. Using hand vacuum pump, slowly apply 5-10 in. Hg vacuum to EGR valve. When vacuum is fully applied, engine should do one or more of the following: � � � Engine should stall. � � � Idle speed should drop more than 100 RPM. � � � Idle speed should return to normal when vacuum is released. Service or replace EGR valve if engine does not stall or idle speed does not respond as specified. Reconnect IAC harness connector. Unplug and reconnect vacuum hose at EGR valve. EGR Vacuum Regulator Solenoid Turn ignition off. Disconnect EGR Vacuum Regulator (EVR) solenoid wiring harness connector. Measure resistance across EVR solenoid terminals. If resistance is not 26-40 ohms, replace EVR solenoid. For additional testing, go to CIRCUIT TEST HE under CIRCUIT TESTS in appropriate G - TEST W/CODES article.
I need your engine size and on the white label I also need to know if it has EEC V or EEC IV?

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Saturday, July 31st, 2010 AT 7:13 AM