I have a '90 305 TPI with 44k miles and has only been driven 8k in the last 10yrs. It starts and runs ok but after a drive it has a cyclic surge at idle and overall it feels sluggish.

I have read some threads that make me think it may be an injector issue so I thinking of putting in a full set and wanted to know if I should stay with the stock 19lb type or if there was a better option available somewhere?

Or if this even sounds like an injector issue to anyone?

 

cant help you about it being the problem

however if it is a set of 19lb bosch III from Southbay injectors would be a good choice...they are a site sponsor

 

Yeah, and so is Injectors Plus... I was hoping that maybe someone from one of the site sponsers might be trolling on here to give a little advice.

Do you know if a bigger injector is available for a 305 or if makes any difference?

 

I would imagine a little larger injector would work in a pinch, but will not provide a power increase IMO due to the fact the O2 Sensor will just see the mixture as richer and the computer will adjust accordingly. The 350s used 22 lb, IIRC.

Have you tried the normal stuff like setting the TPS, cleaning the IAC and Throttle Body carbon out first?

 

If you have a 305 then the 19lb injectors would be the way to go. You can run the 22's if you like, but you will not experience optimal performance or fuel consumption.

 

That's just not true.

You know what is true, flow matching really helps. I flow match each and every set that goes out the door.

Weather you use 19s or 22s is irrelevant to performance or economy, but flow matching isn't.

 

It is true, a bigger injector is not going to give you better performance, it's just going
to consume more fuel.
19lb for a 305
22lb for a 350.
By the way, our injectors ARE flowmatched!

 

No, you are wrong.

1. A bigger injector is not going to give better performance....right

2. The smaller injector is not going to give "optimal" performance as you stated, that is wrong. The performance will be the same either way...wrong

3. Either injector will get the same mileage on the same engine because it takes the same amount of fuel to get the AFR that the ECU is commanding....wrong.

The pulse width will change, but the economy will stay the same. 14.7 is 14.7 and requires a specific amount of fuel to get there regardless of what kind of injector is putting it out it's the same amount.

 

Are you personally testing and flow matching each and every set or are you purchasing them from someone else already matched? If that is the case, who is actually doing the work of matching them??

 

We PERSONALLY flowtest every single injector that leaves our shop. We guarantee our products because we are able to visualize every aspect of there performance on our benches. GUARANTEED!

By the way, if the 19lb and 22lb injectors are so interchangeable for the 305 why bother selling the 19lb...
i guess we should just recomend the 22's is that correct????

 

And I thought we were past shilling....Go figure.... Did she write this for you or just PM a request? Wouldn't be the first time.

My partner does the physical work. I fund and run the business. I'm not doing this out of my house and flowing injectors in the kitchen sink.

But let's get to the root of the discussion. I understand that you're trying to offset the fact that personally doing the physical work somehow is a replacement for having any knowledge or experience. And I can understand that when someone has nothing to offer but a cheap price and "go ohm out your injectors, should be 12-16 ohms."

I find it pathetic that this personal attack on meaningless basis has a place in this discussion and you'd be put up to this and play along. I don't physically make fuel pumps I sell either, or fuel rails, or intakes. I stand behind my products and they are the best quality on the market. That's why I give a lifetime warrantee, something no one else here offers.

I will be filing a complaint with the admins of TGO and people at Ineternet brands so they can see the pattern here. We know what you're doing.

 

Just can't help yourself can you? Just a matter of
time, this will be the THIRD FORUM that you will be thrown off of.
Sorry 88blackgta

 

I was personally banned from Corvette Forum and from Corvette Guru.

Had nothing to do with my business. And was before IP existed. To make it sound like it had anything to do with business practice is wrong.

You should be banned for the unethical practices you promote your company with. I wasn't taking people's money when I was banned.

I want everyone to look up HIGH LOW here and Stampede52 and find out why they were banned. Go look at the few posts they had, draw your own conclusions.

Because SOUTH BAY was using them as shills.

THEN she bought her blood relative into another forum to trash me.

All she has are cheap injectors and no knowledge so she prefers to be unethical. I can point to FTC regulation after regulation. Sony and J&J were fined for doing what she is doing.

So if you want to go personal about my unrelated bannings on other forums, lets have at it.

Then let's have a discussion on your crooked business practice.

I'm all in.

Let's ask the membership here, do you want someone who was banned from other forums for standing on principle, misguided or not, or someone who lies to you about how great they are to take your money?

This is what you do when you're clueless.

Your choice.

 

I think there may be some confusion here.
If the ecm is not set to the right injector constant you will see different air fuel ratios than actual. If you set the injector constants the same as the injector flow rate you are using, then it will calculate the right fuel to command 14.7 air fuel. To do this you need programming equipment.

Flow matching is nice but if your intake flows differently per runner, and the ecm cant offset the injectors (ours cant) then your not really helping any Miniram intakes and my old stealth ram had a problem like that. Else a staggered set of injectors can be used to dial in equal fuel ratios across uneven flowing runners. Just have to know which injectors flow the most and which are the least flowing.
TPI I dont think has any issues.

 

Excuse me??? You are making an assumption that you know who you are talking to when the fact is, YOU DON'T.

And your partners name is: ?? Please tell us so we know who is performing the work. If you are credible, answering that question should not be an issue. You come to this forum, "out of the blue", "bad mouthing" another forum sponsor and spouting off about your knowledge. How do we, as long time forum members, know that you aren't actually doing this out of your house??


Personal attack?? I asked a simple question. You have made it a personal attack on me. For what, because I asked??

Also, You may not make the fuel pumps, fuel rails or intakes but I would expect if someone asks who does, you would answer. Otherwise, how would we know they are the "best quality on the market".

And as for your Lifetime warrantee??? You have been on this forum less than a month. How do we know you will still be in business next week let alone a LIFETIME??


Please file a complaint with the admins, Ineternet and with everyone else on the internet. You will find out that you DON'T know all you think you know.

Your call......

 

I'd check the injector ohms first when warm to see if they are still good. I would check and clean the IAC sensor and housing, clean the TB, check TPS and such as well. Verify fuel pressure is holding and you have good voltage at the fuel pump.

Then go to replacing the injectors. My car had a cyclic idle and it was just a clogged dirty IAC. Then it started to do it again long while later and i ohm'd the injectors and found 2 that were very low in comparison to the others. I bought new injectors and it worked out fine.

 

can we kinda stop this vendor trasch. I am getting sick of it. The use of shills etc just makes us wary of whose posting and whos recomending who. I'm sure everyone can get along. I myself, is fed up with this type of slander back and forth.. why dont you guys go on your facebook walls and leave us the f**k alone. I have been on this forum and others for years and its got to stop or I for one will sign up somewhere else. I am really fed up. Both of you guys fight like little babies. Its rediculous

 

Look irocuroc, i am in total agreement. A couple of years ago i was fighting for my life on this forum with all of the bashing, but it stopped and It has been an enjoyable forum to be a part of for a very long time now. Do you think for one minute that i want to be a part of or involved in this BS??????, It's embarrassing, uncalled for, and unprofessional! once again, i am so sorry to all of the members for having to be subject to this drama.

 

WOW, I did not mean to unleash a sh** storm!! That was ridiculous.

Orr, Fireturd and irocuroc, Thanks for the advice!! Can u give me some or point me to more info on setting the TPS and ohming the injectors(im a newbie).

 

Measure the voltage between I think the A and B terminal wires on the TPS. Not 100% sure but thought it was a blue and black wire but its been awhile. Should read .54 volts or so.

Run the car til its warm and then shut off. Pop off the injector clips on the injectors you wish to read. The two metal prongs on the injectors, apply an ohm meter to the two prongs and record what it says. Stock injectors should be over 12 ohms and closer to 16 if in good condition.