Whats the likely hood it is a bad IDM. I mean it suppose to have a 1 year warrenty. TJ you sounded like you knew the guy. Is he any good?

What should I get for a reading on the injectors to test the valve cover gaskets?

 

I think Bill is looking for the info for you...

Do you have access to a scanner ?...

 

If you unplug one of the 4 sets of wires to the valve covers, one at a time , see if it sets a CEL... also...


if you do this ,note the diff in the way it runs,if there are probs with an injector or two, one or more of the plugs unpluged, won't make much diff in the way it runs....

 

Yes I do have a scanner, but when my first IDM went bad. Nothing come up on the scanner, so I guess that nothing would come up this time. Should it?

 

Even with a bad IDM the scanner should work. Also can you give a link to the auction? if it who I think it is I have heard nothing but good.

 

Can it do a buzz test ?....

 

So even when the first one went bad. It should have come up on my scanner? Cause it ddin't.

This is the guy I bought it from.

http://cgi.ebay.com/ebaymotors/SALE-...spagenameZWDVW

 

No I think its only feature is to read the trouble codes.

here let me go and try the scanner and see what happens. I'll be back

 

Yep thats who I thought. I have not heard any bad things from them. I think my dad has bought a few hard to find PCM's from them. Give them a call but I would ohm check the harness first.

 

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deleted , screwed up ?....<O</O

 

Just scanned three times and nothing each time. I'm pretty sure that the scanner works properly but you never know. I can check the ohms on the harness tomorrow. Shouldn't I get like 3.5 ohms? If I remember correctly.

 

This is from Patrick Feeley
On each valve cover connection there are five pins. The outermost pins (pins 1 & 5) are for the glowplugs. They should not have continuity with each other or the center three. The center three are for two of the injectors in each bank. The ohm reading between each outermost injector(pins 2 & 4) and the center pin (pin 3) should be about 2 ohms (if I remember correctly <?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shapetype class=inlineimg id=_x0000_t75 title='\\\"Stick' stroked='\\\"f\\\"' filled='\\\"f\\\"' path='\\\"m@4@5l@4@11@9@11@9@5xe\\\"' alt='\\\"\\\"' src="http://images.ford-trucks.com/forums/images/smilies/tongue.gif" border="0" o<img Tongue\? Out></v:shapetype>referrelative<V</V Pins 2 & 4 should also not have continuity with each other. The undervalvecover harnesses are just replaced as a "unit" if they are bad (there are 4 of these harnesses per truck, 2 per side). Does that help? Cheers!

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When you ohm it out do it between the outermost and the center pin (ground) and then do the outermost and the block or a good ground to eliminate wiring probs.

 

Casey

Test everything right from the IDM connector.
Its unknown what the modded IDM could of done when it burned.
The IDM has high (injectors) and low (PCM) voltage outputs.

Could not find the ohm on inj coil.

Maybe test the new IDM in a working truck. Could save you some time.
Do not put the working IDM in your truck as a test.
It will ruleout the IDM

Bill

 

3.5 ohms is what I have always seen for testing injectors.