1.9 Vanagon fuel injector impedance low, do I replace?

[zachrf]

84 1.9 stock diji system, van bucked like it was losing power two days ago for about 30 seconds, drove home okay but not super spirited. fired it up in the morning and all was well for about a minute til I gave it some gas to reverse and it died, will not start now even a day later. possible sounded like it was running on two cylinders as the exhaust note had no lope to it, just a constant putter.

I have spark at the plugs and fuel at the T fitting, and the plugs are wet with fuel when I pulled them out. however, injectors 1/2 ohm tested around 4 ohms and 3/4 tested 16.5 right in Bentley spec both at the ecu harness and at the injector themselves. does this constitute a replacement? or should I keep troubleshooting. I'm not an expert with a multimeter and the bentley doesn't have guidance on what to do if it ohms bad.

[MarkWard]

I have a vague memory of a mistake in the Bentley manual. Anyhow, unplug the injectors and meter each one the same orientation with the red lead on one pin and the black lead on the other. Easier said than done. I have a spare pigtail that makes measuring easier. Once you verify the individual injectors have matching resistance, they should, you can move onto the harness. I don’t recall the mistake, but it was something about measuring resistance at the ECU plug. With the injectors still unplugged ohm out each individual wire between the injector plug and the ECU. Use the manual for the pin out. I’d have to have the manual in front of me to advise more and I don’t. If the injectors individually match and you have no open or high resistance wiring, you need to look elsewhere.

[Mr.LowPower]

on my 1985 1.9L each of my injectors measures 16.5 ohms on the nose, reading 4 ohms on injectors 1/2 seems suspicious to me. If it were me, I would probably look at replacement.

[MarkWard]

If you decide to replace the injectors replace them in a set of four.

[E1]

^^^ Totally agree with this, recommend five to always have a perfect spare.
_________________
1984 Westfailure/2.1 Digijet/5.43 Ring & Pinion/Peloquin/D-rated BFG KO2s
AI has spoken to further illiteracy, to steal, to cheat, and to replace humans

"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere." — Colin Chapman

[zerotofifty]

If your reading is correct, you have shorted injectors. Double check as you stated you are not an expert at multimeter use.

Id only replace the bad ones. Save money, why replace good injectors with new, unless you are rolling in money.

Also confirm the two injectors that read low ohms are the same part type as the high ohm ones. maybe you have a mixed set. buy the corrects replacements!!!!!

[E1]

If Mark or I are rolling in money, it must be a few hundred pennies.

There’s wisdom in matched sets sometimes, in this case, mpg. Anytime an injector or two go bad, the others are probably about to. False economy in letting that happen.
_________________
1984 Westfailure/2.1 Digijet/5.43 Ring & Pinion/Peloquin/D-rated BFG KO2s
AI has spoken to further illiteracy, to steal, to cheat, and to replace humans

"Adding power makes you faster on the straights.
Subtracting weight makes you faster everywhere." — Colin Chapman

[zerotofifty]

One may simply measure the injector flow rate to determine if they are matched. It is false economy to replace perfectly good injectors.

[85Westylover]

[zerotofifty]

[85Westylover]

[jlrftype7]