Anyone have experience with these injectors? Do they typically required ECM tuning similar to the Bosch III or are they ready to go with out ECM modifications? I'm especially interested in 305 TPI applications, but I think the 350 TPI experience will probably be a tell tale sign.

 

Back when I ran a 730 ecm I used half a dozen different injectors and I never had to change anything besides the injector constant and fuel pressure. If your pulsewidth is above 2 at idle and below 9 at wot the fuel injectors should be acting in a predictable linear fashion and shouldn't need anything special done.

 

They absolutely don't need tuning. They are stock replacement and are 100% compatible to the original Multec. I have the 19 lb in my 92 TA 305 TPI and (obviously) the 22 lb in my 88 GTA 350 TPI. Best injectors you can buy for a stock setup. I bought them from southbay a few months ago.

 

 

Thank you for the feed back on this. I will probably go this route and report back. I'd love to learn how to play around with the ECM, but those plans are further down the road. Right now I just want to get my baby back on the road after getting a lift installed and fixing the roof and fixing everything else and going to work and managing the honey do list........ you guys know the drill !

 

Buy a simple obd connection to your laptop so you can at least see what the ecm is seeing and doing.

 

 

They run rich for me; BLMs are low (108 at idle.) I am currently working with Scott to tune for them.

Car ran fine, but failed California smog.

Once it's all tuned and passing smog, I'll post back in this thread to confirm.

 

Interesting... I don't have those problems on both my cars. The LB9 runs fine around ~128 BLM and INT, as well as the L98. Both engines are bone stock, the LB9 is completely rebuilt and ran ~1000 miles since and the L98 has 20.100 original miles on the odo. Please report back to us what you found out and how you solved in case I will ever have the same problem...

 

 

 

Experiences are going to vary so widely because they could be going from an old stock style injector that sprays fuel like a fire hose to the newer style that sprays more of a mist. Could be the old injectors had a failing coil or a dirty filter basket. Could be varnish build up inside the old injectors.

 

I have the 86-89 tpi with ecm 1227165 and bought a ALDL cable from Red Devil River and I couldn't get it to connect. Then read that the 7165's were hard to connect without any rhyme or reason. I was hesitant to buy anything else but moates.net assured it would connect unless the ECM was bad. Needless to say I haven't had any issues connecting since buying the moates.net product. You can always check in the "parts for sale" section of TGO for used ALDL cables.

 

Was thinking along the same lines, guy has old injectors, doesn't realize they are not very good anymore, puts on new ones and thinks they are better than new. I'll let you know, cause I was one of those guys thinking my injectors were perfect, until the last few months.

 

I ordered the Bosch III 19# for the LB9 and was told they would be a replacement without any tuning however that did not seem to be my case. It would not start cold with out cracking the plates and ran really rough for a 10 secs then clear up. I had to adjust the Crank Fuel PW and Change the Single and Double fire FI size to 17# In my case I did not have to change Injector Pluse width correction Vs. Battery voltage. I will say that Bosch III my car runs better but only after changing settings.

 

I've tuned countless MAF cars and there is only one MAF car I haven't been able to talk to, and it's Chazman's 87 convertible. No idea why, but I simply cannot get that car to talk to me. In most other cases I can datalog MAF cars just fine, or I'll be going along and the ECM will drop the datastream randomly, which is super annoying, but just shut the car off and re-start it and I've always been able to immediately re-connect.

Jeremy

 

Yeah, that seems to be the case with lots of folks... Certainly was in my case. I remember when I started the car up for the first time with the right voltage offsets and flow rate constant... I immediately knew it was "right" without before even driving the car...

They're great injectors, but lots of people need to tuning to get there. Though It seems to be hit or miss though on whether you need tuning or not and I'm not sure why... one person says the car ran great with no tuning, another person says it needed tuning. Go figure...

 

I am following also. I am going to be ordering these for my TPI build. I feel my Mutecs work great as the car runs and idles great, but how do I know this? I won't.
I was told you won't need a tune for these so this is why I decided on these. Did you get a 10% discount from southbay?

 

I've now installed Delphi Injectors on three different L98 cars, including my GTA. No calibration changes were needed. Cars all now run top notch.

I got them from FIC, and they often have great sales which beat any other prices online.

https://fuelinjectorconnection.com/c...amaro-firebird

 

Keep in mind that tgo members get 10% off

 

I have had 0 issues with communicating with my 88 using the moates.net cable. Well, once I downloaded a driver and got all the settings correct. Have been using WinALDL.

 

How do you change the settings I got the same problem but I have the 350 tpi

 

You need to use tuner cat or tuner pro to make the changes to your tune.
If this is profile car 89 tpi you need $6e mask xdf.
You also need a burner and piggyback adapter.

 

No joy in connecting to my '165 ECM even with the moates ALDLxtreme cable... It only works in 10K mode but that of course is not working for tuning the car as it changes a lot of the things like idle rpm etc. :-( I'm glad for ya'll being able to connect to your '165 ECMs. Wish it would do that for me too :-(

Not easy to find another '165 here in Switzerland to try a different one.

 

A few weeks or so out on actually trying to start the engine with these. Started re-assembly of MPFI fuel rails last night and realized the kit I purchased is missing an o-ring. Need to look on the box which is not here, but I think it was the fuel pressure regulator kit. The missing o-ring is for part #250, the connector, base to fuel rail. The short connector that goes into the base of the fuel press reg. I guess they don't expect you to remove this part from the base, only the fuel rail. huh? it needs 2 o-rings, not 1.

Upon this set-back thought I'd look up the Delphi Part number of the injector. Don't need this to be the next issue. Can't find it. What gives? Nothing for a 305/LB9

 

I put a set of the Delphi on my wife's 1987 L98 about a week ago, and so far they run good. They replaced some old Rochester injectors that were still running really good, but I suspected #1 was overfueling so I went ahead and just replaced them all since they looked old. I did a lot of forum searching prior to ordering them from Southbay and found nothing but good things about the Delphi, but pretty mixed reviews on the Bosch III.
The old set ran great and these new ones seem to run just as good. I have no interest in retuning, so these were just what I needed. Worth the extra cost to me.

 

I'll be getting a set of Delphis for a upcoming project. Found them new local for under 400$ (30lbs) and they have a similar look to the old stockers so that's not to bad..

 

nearly identical except color and o-rings.

 

hoping to fire up the bird later today. fingers crossed, or I'm gonna be scrambling for data logging equipment and learning how to use it.

 

Bird fired right up! Running strong. Haven't timed it yet, just set dizzy based on #1 at TDC. Ran out of time today, will get more done Thursday. No way of knowing for certain with out logging some data, but injectors seem to be a direct drop in!

 

update. timed it today. to spec. seems to run better with at 10 BDC than 6. anyway, seems to hesitate upon hitting accelerator. hard to be sure. i have throttle body open and may be confusing air sucking with hesitation. i had separated throttle body off to clean it up a bit and damaged gasket, so that could be it. plan is to rebuild it but could wait to find out if she would start. have not road tested. this is all while in park.

 

Soooo nice to see a good clean factory looking engine in these..

 

took her for a short, full throttle spin today while terrorizing the neighborhood. runs like a LB9. these injectors are fantastic!