Fuel injectors

Jonpro03 · May 30, 2009, 01:14:24 AM

I installed a set of 24lb/hr injectors and now my car runs like crap. As soon as it fired the ses light came on so we scanned and the coolant temp sensor reads -34 degrees or something like that. I checked to make sure its pluged in and it is. I couldn't figure out why it isn't working. Anyway, the engine keeps flooding on start. I have to start the car at wot just to get it to run and I cant drive the car because as soon as I hit the gas, it dies. It's obviously running too rich, but my question is: Is it because of the injectors or the coolant temp sensor not working?

Thanks

Jon

TGP Nick · May 30, 2009, 01:36:48 AM

It is because of the injectors. You will need to tune your car to run with those injectors, or get a set that flows less fuel.

I'm running C302 Yellowtop 19lb/hr (about 22# with our fuel pressure) injectors as replacement for my stock Multecs in my TGP, and they work fantastic.

Jonpro03 · May 30, 2009, 01:40:07 AM

Thats an awful shame. I spent all that time putting them in. I guess Ill swap back the stockers.

I do have a topgun 160 chip tho

But I guess I have to put the old ones back in.
:icon_frown:

Thanks Nick

TGP Nick · May 30, 2009, 01:56:35 AM

So long as the stockers don't leak and they ohm out good (around 12.2 ohms IIRC) they will work plenty fine for a stock application with the chip. Be sure to replace your o-rings as well. ;)

stargazer7467 · May 30, 2009, 07:48:43 AM

+1 on the yellow tops, go to the yard and find some. Worth it.

dogginred90 · May 30, 2009, 09:10:16 AM

+2 on yellow tops, you cant go wrong picking yourself up a set of those.

Prospeeder · May 30, 2009, 10:24:09 AM

if the coolant temp sensors reading -31 that would cause a super rich mix too, the wrong injectors arnt gonna throw the ECU temp sensors readings off. id check the wireing or replace that sensor also. But yes you do need a tune for bigger injectors. The yellow tops rock, i got a brand new set off ebay for 160$

stargazer7467 · May 30, 2009, 04:34:29 PM

Yeah its a common thing for the plugs on the coolant temp sensors to fubar themselves. Most parts store stock them.

Fred931 · August 06, 2011, 07:34:58 PM

Are these the yellow-tops you guys mean? M-9593-C302?

http://www.mustangsunlimited.com/itemdy00.asp?T1=M9593C302+01

My stock injectors went bad. ~~Do I also need to have a new tune at first to run with these new ones?~~ Read some more, yes, I do. Gonna wait for someone to verify these are the right injectors before I get that and the tune.

Fred931 · August 09, 2011, 07:43:08 AM

Well, I don't have any idea what happened to the last two posts, but I still need to know if these part-number injectors are the right ones for the car before I blow my money on those and a chip...

killinprixs · August 09, 2011, 01:41:57 PM

Yes Fred, the yellow top c302s worked great with a tune. Before i upgraded to a big turbo i had a nasty tune from Flybynite with 22# yellow tops , stock turbo setup and upgraded comp housing/ wheel.