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#2425958 - 12/30/17 02:50 PM Good source for injectors?
Satilite73 Offline
I Live Here

Registered: 01/19/03
Posts: 12610
Loc: Between Houston & Galveston TX

Is there a good source for buying replacement stock injectors, new or refurbished?

I want to replace the injectors in my (stock) '93 Dakota with the 3.9. Truck has over 170K and one of the injectors is cracked, I think it may be leaking.

I had read about upgrading to 4 hole injectors and went that route when I found a refurbed set for almost 1/2 price, but the truck runs like poo with them.

The stock injectors I've seen priced $35 - $85 ea. (new ones in the upper price range). What kind of price should I expect to pay?

Its times like this that I appreciate young people being lost on carburetors.... pity
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#2426009 - 12/30/17 04:47 PM Re: Good source for injectors? [Re: Satilite73]
savoy64 Offline
top fuel

Registered: 09/07/11
Posts: 1802
Loc: colorado
i heard the ford yellow tipped injectors were a performance upgrade for the stock magnum ones----dont know how or why.....

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#2426015 - 12/30/17 05:17 PM Re: Good source for injectors? [Re: savoy64]
Satilite73 Offline
I Live Here

Registered: 01/19/03
Posts: 12610
Loc: Between Houston & Galveston TX
Originally Posted By savoy64
i heard the ford yellow tipped injectors were a performance upgrade for the stock magnum ones----dont know how or why.....


I tried those. frowwn

I don't know if I got a 'bad batch' as they were reconditioned or if the truck honestly won't run with them.

For now I put my old ones back in.

popcorn

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#2426027 - 12/30/17 05:39 PM Re: Good source for injectors? [Re: savoy64]
kpzbee Offline
super stock

Registered: 01/20/03
Posts: 884
Loc: Wooster, Ohio
Originally Posted By savoy64
i heard the ford yellow tipped injectors were a performance upgrade for the stock magnum ones----dont know how or why.....

I've put several sets in Magnums over the years with noticeable improvement. I'll bet you got a bad set.
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It's really just one endless project designed to induce insanity and bankruptcy."

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#2426059 - 12/30/17 06:56 PM Re: Good source for injectors? [Re: Satilite73]
71birdJ68 Offline
master

Registered: 02/09/12
Posts: 3885
Loc: Morristown Tn.
I found good ones at the federated store.

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#2426105 - 12/30/17 08:18 PM Re: Good source for injectors? [Re: Satilite73]
Blusmbl Offline


Registered: 01/20/03
Posts: 7409
Loc: Plymouth, MI
Rock Auto seems to have some reman ones for $25 apiece + $10 core. Not sure how much you'll get hit with for shipping though.
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#2426120 - 12/30/17 09:02 PM Re: Good source for injectors? [Re: Blusmbl]
Satilite73 Offline
I Live Here

Registered: 01/19/03
Posts: 12610
Loc: Between Houston & Galveston TX

I put my stock ones back in, ran pretty much as before.

As an early Christmas present to myself, I bought a red top dry cell battery for my wagon about a month ago. The wagon isn't at the point I can run it on a regular basis, so, I figured I'd put the new battery in the Dakota rather than 'waste' it....

shock

This truck has never, and I mean NEVER run as smooth as it is right now. The blubbery sound at idle is gone now too.

The battery that was in the truck is a stock replacement from Advance Auto and is about a year old.

I was so amazed by the new found smoothness, I drove around for almost 2 hrs with no particular place to go. I bopped around town at slow speeds, I sat in bumper to bumper traffic, I bombed down the freeway (I have a shimmy at 85 I didn't know about.... blush ) with no issues at all.

And the gas gauge barely moved.

Maybe I stumbled onto the real problem? shruggy

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#2426220 - 12/31/17 03:33 AM Re: Good source for injectors? [Re: Satilite73]
Guitar Jones Offline
master

Registered: 12/18/09
Posts: 9733
Loc: in a cattle trailer down by th...
I think replacing the battery just cleared the adaptives. It will be back to running crappy in awhile.

Replace the thermostat and check the insulation on the wires for the coolant temp sensor there.
_________________________
The Scamp is sold, now just two old trucks.
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc conversion. Hydroboost coming soon
'74 W200 Crew Cab 360, NP435, D44, D60 and NP205 divorced transfer case. Magnum 5.2 MPI coming soon.

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#2426296 - 12/31/17 10:50 AM Re: Good source for injectors? [Re: Satilite73]
340Cuda Offline
top fuel

Registered: 04/04/03
Posts: 1973
Loc: Tulsa, Oklahoma
Low voltage can certainly change the characteristics of an injector. Maybe the stock ECU could not keep up with it.

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#2426378 - 12/31/17 12:46 PM Re: Good source for injectors? [Re: Satilite73]
cudaman1969 Offline
master

Registered: 01/25/04
Posts: 4335
Loc: fredericksburg,va
Put the old battery back in, see what happens. I'm all ears. Got a van that runs bad, I never thought of this (alternator makes noises)

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#2426401 - 12/31/17 01:17 PM Re: Good source for injectors? [Re: cudaman1969]
Satilite73 Offline
I Live Here

Registered: 01/19/03
Posts: 12610
Loc: Between Houston & Galveston TX
Originally Posted By cudaman1969
Put the old battery back in, see what happens. I'm all ears. Got a van that runs bad, I never thought of this (alternator makes noises)


When I first put my stock injectors back in, I hadn't switched the battery out yet and it ran no different than before I initially took them out (blubbery sound at idle, occasional misfire, rich smell).

When I swapped batteries, the time disconnected was just a few minutes, not a long period like overnight. As soon as I fired it up, I could hear (and see) a difference.

When I drove around aimlessly yesterday, I put almost 70 miles on it. I have yet to go out today.

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#2426412 - 12/31/17 01:35 PM Re: Good source for injectors? [Re: Satilite73]
Satilite73 Offline
I Live Here

Registered: 01/19/03
Posts: 12610
Loc: Between Houston & Galveston TX

I worked at a used car lot back in '98-'00 and the Dodge trucks would always give us fits because customers would drain the battery down not so much that the truck(s) wouldn't start but enough that they wouldn't idle.

(none pf the trucks were older than '96)

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#2426605 - 12/31/17 04:20 PM Re: Good source for injectors? [Re: Satilite73]
Guitar Jones Offline
master

Registered: 12/18/09
Posts: 9733
Loc: in a cattle trailer down by th...
Put the old battery back in then and see what happens.
_________________________
The Scamp is sold, now just two old trucks.
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc conversion. Hydroboost coming soon
'74 W200 Crew Cab 360, NP435, D44, D60 and NP205 divorced transfer case. Magnum 5.2 MPI coming soon.

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#2426687 - 12/31/17 06:15 PM Re: Good source for injectors? [Re: Guitar Jones]
fourgearsavoy Offline


Registered: 12/07/04
Posts: 9252
Loc: Rittman Ohio
I'm not sure about Mopar throttle bodies or ECM's but Toyota throttle motors need at least 3 driving cycles to reset the memory. They do not idle correctly and don't shift like they used to until it re-learns your driving style.
Injectors on domestic cars must be fragile because in over 30 years of working on Asian imports I may have replaced 20 injectors shruggy Most Yotas go over 300,000 miles
on the original injectors.

Gus beer
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#2426808 - 12/31/17 08:06 PM Re: Good source for injectors? [Re: Guitar Jones]
Satilite73 Offline
I Live Here

Registered: 01/19/03
Posts: 12610
Loc: Between Houston & Galveston TX
Originally Posted By Guitar Jones
Put the old battery back in then and see what happens.


See above. I didn't switch batteries right away.

However, I think you're onto something regarding temp. I ran some errands this afternoon, (ran the truck a good two and half hours) and while the temp gauge read normal, the lower house was cold, like the truck had never been run.

I replaced the thermostat in March, and burped the system then and recently.

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#2428456 - 01/03/18 05:23 PM Re: Good source for injectors? [Re: Satilite73]
ragtopdodge Offline
master

Registered: 01/20/03
Posts: 4697
Loc: Seattle
http://www.witchhunter.com/

get your existing ones rebuilt.
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#2428754 - 01/04/18 06:16 AM Re: Good source for injectors? [Re: Satilite73]
360view Offline
master

Registered: 01/18/06
Posts: 4402
Loc: USA
What fuel injector atomizes best?

Which fuel injector is most resistant to clogging?

Which fuel injector is most durable and keeps spraying acceptably longest?

Those are all questions I would pay to know,
but in 20 years of asking and reading,
i can only say that many years ago an official EPA paper stated that
Holley 14 hole fuel injectors atomized pure ethanol better than all others tested.

I have previously read good comments about Witchunter’s technical knowledge of what injectors are out there and what rates they actually flow.

Based on some old General Motors research where they fully atomized gasoline before feeding it to a fully instrumented test engine, i would not expect better spray from fuel injectors to have miraculous results on real engines. Natural gas engines ( including the 1992-1995 Magnum 5.2 V8) had fully atomized fuel and did not leap tall building in a single bound.

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