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Old 11-21-2014, 03:32 PM
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Question 2001 WJ Injector resistance

Anyone know the FI resistances for the 2001 WJ 4.7?
P/N 53032145AA

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Old 11-21-2014, 11:48 PM
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Re: 2001 WJ Injector resistance

10.8-13.2Ohms @ 68F(20C)
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Old 11-22-2014, 10:59 AM
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Smile Re: 2001 WJ Injector resistance

Thanks for the quick response

A couple of questions on this...

Is higher or lower 'better'? (I have not tested them all yet, but so far I am getting 13.1, 13.2, 12.9. Does higher end mean life is ending?)

If in range, does this indicate injector is 'OK' (assuming it is functioning at all)?
Still planning to bench test operation after metering.

If out of range, does this mean toss it, or can it be 'fixed'?

Thanks again!

Doug
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Old 11-22-2014, 11:03 AM
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Re: 2001 WJ Injector resistance

One more thing...

I see most of the advertised injectors with this part number have a green-ish band. Mine are 'rust' colored. 'Sup wit dat?
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Old 11-22-2014, 11:12 AM
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Re: 2001 WJ Injector resistance

Ohms is resistance. Higher numbers equal less resistance. Injectors can fail in different ways. For example, clogged nozzles. If you are measuring the ohms of the injectors, make sure they are disconnected. Don't backprobe the connector with it still connected. Test only the injector itself. Which by seeing the values you posted above, it appears you are measuring correctly.

Not worth trying to rebuild an injector. The equipment required to properly do so is generally not available to the general public.

A few different companies produce injectors. Not all will match.

Not sure what lead you to testing the injectors being we don't know what problem you may be experiencing. If you head over to the WJ forum here on Jeep Garage, you will have better chances of finding a solution for your WJ issues.

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Old 11-22-2014, 01:49 PM
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Re: 2001 WJ Injector resistance

Yes, I know Ohm's law, I'm an EE (not a mechanic! LOL) I don't know if less or more is better, hence the question as I don;t know how they work in the circuit. No connectors involved as they are all on my table, with the coils and plugs!

As for 'why', another forum I was on said 'never clean or fuel test an injector without metering it first'. I did not ask why not, just did it!
Of course they did not mention what the results were supposed to be... that is why I am here and not there!

As for the 'problem', I guess I should have joined the forum before ripping the engine apart, but that's just me, I guess. Went to YouTube first, started pulling pieces off one at a time, testing cleaning re-installing. Too late now, but initial problem was car just stopped, after running fine for years, start-stop-run-stall, hopped the 3 miles home 200 feet at a time. Let it sit in the carport for 5 months, then decided to fix it, as I could not find anyone to do it and cannot afford to do it right (real mechanic-dealer)

Anyway, here I am, parts on the table, hoping just cleaning and testing will fix it. Oh I forgot, I had a rat attack a few years ago and they feasted on my wiring, so its a patchwork of electrical tape. Ran fine for years after (sans heating and cooling systems- have not found where they got to that yet!), then one day just decided to stall and leave me stranded in the desert. (with 4 dogs in the back!) So here I am...

That's my story and I'm sticking to it!

D
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Old 11-22-2014, 04:23 PM
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Re: 2001 WJ Injector resistance

Rats are the devil! Will shoot ya a pm so we don't add too much clutter in here.
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