Join Date: Nov 2006
Location: Surrey B.C. Canada
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Hard start; Stalling; Irractic idle and/or loss of power; DTC P1298 all models--95-96 Econoline in wet weather:
Injector Driver Module (IDM).
The IDM converts 12 volt battery power into 110 volts and activates the injectors as directed by the PCM. On some Econolines water may enter the IDM causing the above symptoms. To diagnose, remove the LH battery and the coolant overflow bottle and access the IDM which is mounted behind the coolant bottle. Remove the IDM(both ground strap bolts need to be removed) and shake it, listening for a sloshing sound. Water running off the roof and cowl areas can enter the IDM; there is a service replacement IDM--F6TZ-12B599-AA--that has improved sealing. Also install foam seals (1)F6UZ-13C795-AA and (2)-BA on the back of the IDM.
If the DTC P1298 is alone when performing code retrieval, replace the IDM; if other codes are present, diagnose them first.
A faulty IDM can cause driveablity concerns similar to a malfunctioning ignition module in a gas-powered vehicle. Under load it will seem as if the engine is starving for fuel. If you verify good fuel and oil delivery and pressure to the heads, and the Mass Fuel Desired, ICP, IPR and Fuel PW readings climb while the RPM's drop, suspect the IDM.
This is all I've been able to come up with so far, hope it helps out.
This is from the Dieselman's site.
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99.5 F350, CC, LB, DRW.
7.3 AUTO 4.10s
AUTOMETER C2s EGT, TRANS, BOOST, OIL, FUEL PRES
ATS, WW, SSHPX, B ANNIH.
DP 6P 140EX.
AFE MAG F STG 2.
MAGNAFLOW 4'' TURBO BACK DUALS.
US GEAR SUPER D-CELERATOR
500LTR FUEL TANK
ALARM & REM START/ ELC BAT DISC.
CB, SAT, GPS, PANASONIC CD, 5th WHL
35' GOLDEN FALCON
Been a mod longer than TJ hahaha