Fuel injector advise, new, cleaned or change........?

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flintknapper

flintknapper

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Deep East Texas
1997 Land Cruiser.........298K miles, original injectors.

Pretty sure I've got one injector (possibly more) not atomizing the fuel.

I am going to either replace all of them or have the originals serviced.

My choices:

1. Buy all new injectors (Denso).
2. Have all original injectors, cleaned and flow tested, reinstall.
3. Switch to used/serviced Bosch injectors with harness adapters.

What say my fellow MUD members?
 
Dr Injector in Rancho Cordova CA. Great writeup in 4WDTO magazine, and a buddy had his 4runner injectors done there, and was thoroughly pleased. Very fairly prices as well!
 
There's a bunch of injector cleaning/testing places. I used RC Eng in Socal, fwiw. Any place with decent reviews will do fine, it's not a particularly high tech procedure...

They will replace the mesh screen, and put new o-rings/seals on. To be safe I purchased new OEM o-rings/seals and kept the others as 'spares', didn't want any risk of leaks and having to do the job twice.

Take care re-installing the injectors and apply some dielectric grease etc to make sure the rubber seats smoothly without pinching into the fuel rail and into the pockets in the head. If you mess this part up you will get leaks.

Good time to replace the fuel filter too. Slot the holes, it'll make it easy to remove next time. The banjos can be a bit of a pain, there's also copper (or maybe it was aluminium) washers on them to help seal.

cheers,
george.
 
george_tlc said:
There's a bunch of injector cleaning/testing places. I used RC Eng in Socal, fwiw. Any place with decent reviews will do fine, it's not a particularly high tech procedure...

They will replace the mesh screen, and put new o-rings/seals on. To be safe I purchased new OEM o-rings/seals and kept the others as 'spares', didn't want any risk of leaks and having to do the job twice.

Take care re-installing the injectors and apply some dielectric grease etc to make sure the rubber seats smoothly without pinching into the fuel rail and into the pockets in the head. If you mess this part up you will get leaks.

Good time to replace the fuel filter too. Slot the holes, it'll make it easy to remove next time. The banjos can be a bit of a pain, there's also copper (or maybe it was aluminium) washers on them to help seal.

cheers,
george.
Click to expand...


Fuel filter recently replaced (not fun), so that won't be necessary.

Good advice on reinstalling the injectors. Have plenty of recent experience there. In the last 6 months I've removed, cleaned, checked (ohm'd), installed new filter screens, pintle caps and Orings on my LX470 and a Full Size Bronco I have, so the process won't be new to me.

But very good suggestions, thank you for that input.

Are there any hoses, etc. under the intake that need replacing while I have it off? (those while you are in there things)?
 
Phildoh said:
Dr Injector in Rancho Cordova CA. Great writeup in 4WDTO magazine, and a buddy had his 4runner injectors done there, and was thoroughly pleased. Very fairly prices as well!
Click to expand...

Jake just serviced mine a couple weeks ago! Great guy and great service. The paperwork was awesome, based on how each injector performs he tells you what order to put each injector in. I changed the fuel pump sock and filter before throwing the clean shiny injectors on. For all 6 with new isolators and o-rings it was $140. Well worth it imo. I think a new single sensors injector costs around 150! And I would changed all the vacuum hoses under the plenum while it's off. Be sure to check/test each vsv while you're in there. One of mine was bad and wasn't giving vacuum to the EGR.
 
The throttle body bypass hose (can be more pesky than the PHH to reach) would be a good idea, since you'll have the throttle body off etc. The hose runs from the throttle body to the block (about 10 o'clock compared to the PHH). And of course the PHH if it hasn't been done (pull the starter out for a bit more access).

cheers,
george.
 
george_tlc said:
The throttle body bypass hose (can be more pesky than the PHH to reach) would be a good idea, since you'll have the throttle body off etc. The hose runs from the throttle body to the block (about 10 o'clock compared to the PHH). And of course the PHH if it hasn't been done (pull the starter out for a bit more access).

cheers,
george.
Click to expand...

Sounds good.

PHH done, some years back with silicone hose, should still be good. EGR all disconnected many years ago, so nothing to do there. TBB hose will do.
 
Just had mine done at 178k Miles. Average under performance was 4% less than spec flow
 
93yotasr5 said:
Jake just serviced mine a couple weeks ago! Great guy and great service. The paperwork was awesome, based on how each injector performs he tells you what order to put each injector in. I changed the fuel pump sock and filter before throwing the clean shiny injectors on. For all 6 with new isolators and o-rings it was $140. Well worth it imo. I think a new single sensors injector costs around 150! And I would changed all the vacuum hoses under the plenum while it's off. Be sure to check/test each vsv while you're in there. One of mine was bad and wasn't giving vacuum to the EGR.
Click to expand...

I myself haven't used their services yet, but plan to in the next year or two when a top end job is performed. Two friends actually ha e used them, both very happy. I was also told the same by my buddy about the flowchart and install order, which I believe is worth an extra $20 just for his time, that him as a business going above and beyond, very professional! I live about 20min from their shop, so I'll definitely be there sometime next year! Glad to hear you as well we're thoroughly pleased by his work, adds one more to my list of happy customers, and still a "0" on the list of friends/acquaintances who were not happy!
Cheers!
P
 
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