Hey guys, the motor in my 49 Dodge pickup is a 5.2 out of a 96 Dakota with about 60,000 miles on it now. I suspect most of the donor truck's use was originally only winter use because the truck only had 44,000 miles on it (the frame was rotted away) up until I used the drive train in my 49 and started driving it in 2022. That means most of the time those injectors say with pressure on them and no use. Since then I have put around 16,000 miles on it.

I'm thinking it might be a good idea to just replace the OEM injectors, but the options sound pretty limited. I can get OEM rebuilt injectors for around $400, or I can buy new Bosch injectors for an LS Cheby for $350. At that price point I think I would rather buy new rather then rebuilt OEM. Supposedly the GM Bosch units are 4 hole compared to the one hole Mopar OEM and are better at fuel atomization, but there is some question as to if they are a plug and play, or if I need an adaptor to connect them to my wire harness.

This is not a race motor, just a daily driver.

What is the word from the Mopar camp?

No one has replaced the injectors on their 90s Dodge trucks?

Anyone have any idea if I need the adaptor for the electrical connection on the injectors to be able to install newer injectors in my 96 Dakota V8?

Injectors can either be ev1 or ev6- that describes the type of connector to the injector itself
Chrysler used both
96 should be ev1
I like the 4 hole injectors and been using several sets from CS perfromance on ebay. They call them upgrade injectors, they are like 22 lb/hr at 39 psi- can be overdroiven in vehicles using 49 psi, like what the ev6 trucks came with.
AVOID adapters at all costs- some real junk out there

I went to pic-apart got 3 sets from various models, rails too, $30 each, chasing an issue, they weren’t the problem but never found any difference in the ones I changed. Must not go bad imo.

So I went on the CS Performance website, all their listed injectors are rebuilt by themselves. Their list of injector options have 94 & 95 5.2, or 99 to 2006 5.2/5.9, all for the "upgrade" injectors. The only listing I see for the 96-99 is the OEM replacement injectors or injector repair kits. I hate it when everyone wants to skip a few years in their listings.

I read on one of the websites that the change between the EV1 and the EV6 was when Dodge went to the OBD2 system, but it failed to tell which EV was the early one and which was the later one.

Prices are all over the map as well. There are "no brand name" rebuilt 4 hole injectors on Ebay for as low as $69 for a set of 8, ranging up past $260 for a set of 8 rebuild by Bosch, to $63 each for brand new Bosch.

The Siemens Injectors, which are supposed to be OEM Mopar parts and replacements are new injectors for around $259 for a set of 8.

I was not expecting this big of a mess!

Changing the injectors on this truck is going to be a pain, I would rather just have to do it once if possible.

Injectors rarely ever go bad, My truck has 240K with the originals and no issues. I have not seen proof(dyno results) that the 4 hole ones are any better than the single. If i where going to replace my injectors i would get flow matched ones.

I researched replacement fuel injectors for my OBD-I 1995 Magnum 5.9V8

I still had this post-it note with info:

OEM 53030262
255 cc (24.5 lb/hr at 35 psi)
made by Siemens

Bosch Part # 0280150927
234 cc

Delphi Part # FJ10417

(I think these above are EV1 plugs)

My fuzzy memory is the the 1995 V-10 ran at a different fuel pressure than a 5.9V8
but when you adjust for pressure it is just a hair higher flow

The OBD-I 1994 to 1995 Magnum 5.2 allegedly had a smaller 18 lb/hr injector
but all the 1994-1995 ones I have checked in junkyards had the same part number
as my 5.9V8

Perhaps the 1992 to 1993 Magnum 5.2 was the 18 lb/hr ?

At some point OBD-II Magnums went to higher fuel pressure, 48 to 52 psi range.

Here in moparts we discussed ‘E’boggers article in Mopar Action
on getting his V6 to V8 Dakota’s injectors cleaned
and decided the injector cleaning company had sent him back bigger 1994-1995 24.5 lb/hr injectors than the ones he mailed them.

My original interest was “balancing” air fuel ratios in all 8 cylinders
by “custom fitting” slightly different flow injectors
to match the unique air flow each intake runner was getting, due to factory tolerance not being all that precise.

A more practical way to do this would be to drill and tap a hole in each intake manifold runner - then screw in a “blocking bolt”.
This is how natural gas furnaces have the air/ fuel ratio balanced
using flame color match on multiple burners
to minimize “excess air”.

This idea of flame color is used in the “Colour-Tune” British spark plug.

Thanks guys.
i believe I'm gaining more understanding. I'm probably going to just order the rebuilt originals.

My area of concern about the injectors is not so much they are "wore out" because in general, they are pretty much low mileage items, my concern was more towards the amount of time they were not in use over the years. The truck was only driven about 1500 miles a year from 1996 until it came into my possession in 2020 I am more concerned about carbon build up inside the injectors that may prevent smooth, consistent operation, which I believe my problem is.

I suppose sending them out to get cleaned would probably be the best answer, but this truck is my daily driver and one of only 2 vehicles we have here, with two drivers often going different places at the same time. I can't afford to take it out of service for a week or more it may take to send off and wait to get my injectors back.

Another factor in this process is that changing the injectors on this motor in this truck will not be a simple process. Its going to require the removal and reinstallation of the painted 3 part hood (a 2 person job). I've watched the videos about changing them. I expect this to be another one of those experiences where doing it one time will be plenty for me. I'm getting too old for this stuff.

Pic 1) The hood before paint. The center piece is attached to the top of the firewall at the rear, and to a panel in front of the radiator in the front, and the sides hinge off that center piece and latch to the fender supports.
Pic 2) The reason for the hood removal. That air filter housing has to be tipped just right to get it out from under the hood. This would be the easy side.
Pic 3) There are two of those aluminum tanks bolted to the filter housing now, both will have to be removed to remove the filter housing. This side isn't going to be very fun, even with the hood removed. The motor is mounted on factory Dakota 4x4 motor brackets, and the brake booster is bolted to its original position on the Dakota firewall.

You should be able to find a local shop to clean the injectors.Check truck shops.

There's a Bosch certified injector place about 6 miles away from me

I will look into it, but most places around here don't do any specialty stuff inhouse, they all ship stuff out. By the time I pay for the new "O" rings, the cleaning, the price markup, and the shipping, I'm probably close to the price of buying the rebuilt ones on line and having them shipped to me. I also won't have the down time.

They list 92-94 injectors- and 1% flow matched even
Those years injectors had higher flow rates- in 96-99 they were the corporate flow rate which was like 23.2 lbs/hr at 49psi.
Those upgrade injectors are significantly lighter than the original style pintle injectors and its your decision on pintle 1 hole vs 4 hole sinjectors. Controversial topic.
I like the lighter 4 hole injectors- running 2 sets- one in a 2001 5.9 and one set in 99 5.9.

I'm not understanding why the hood has to come off. You're not doing an intake swap are you? I have a '93 Dakota (3.9), and the injectors weren't a huge process. You just need to lift the fuel rails enough to clear the injectors.

I would just order the rebuilt originals.

There are in place (Non Dismantle) fuel injection cleaning kits available. The set up is as follows; Disconnect the fuel lines to the injection fuel log on the supply and return ports. Cap the return port and attach the injector cleaning equipment. Start the engine and let runs until the cleaning agent runs out. Re attach connections to normal and your done. I used this process quite a bit back in the 90's and it worked well.

Where might I get something like this these days? Is there a brand name or something to look for online?

You looked at my pictures, right?

I was in the shop this after noon and looked at the setup. The passenger side should be easy, the driver side, not so much. I will give it a shot without pulling the hood.

somewhat expensive.........

https://www.ebay.com/itm/172341162464?

https://www.ebay.com/itm/325928977115?

cheap version : https://www.ebay.com/itm/145110732909?

I had the two Bosch injectors for my 1994 BMW R1100RS cleaned and flow matched years ago by this shop in Depere WI:

https://dsgbinc.com/

They said my injectors, at that time with 150,000 miles on the bike, were very clean and required little work. But I rode the bike regularly and at least twice a year ran Techron in the fuel, and always used premium whole gas. I use NO E10 or E15 crap in any of my small engines, never had a fuel related issue with any engines.