Quick TBI question

[Burbdood 74]

Just a quick question here, but I replaced the injectors on my 88 Suburban a few weeks ago. It's been running damn good, but today it wouldn't idle for crap. It was puffing out black smoke and it tried to die a couple of times as well.

Anywhoo, I found out the the drivers side injector is leaking around the top and flooding out the engine. It even leaks out when I disconnected it and had my wife start it. That's a symptom of a faulty O-ring right? I'm hoping it's not a faulty injector but since I disconnected it and it still dribbled out, I kinda doubt it.

Sorry if this sounds noobish, but I've gone through hell with this truck this summer and I'm kind of paranoid right now.

 

[GalDemSuga]

Pull the injector pod and change the rubber oring and metal oring.

Just a quick question here, but I replaced the injectors on my 88 Suburban a few weeks ago. It's been running damn good, but today it wouldn't idle for crap. It was puffing out black smoke and it tried to die a couple of times as well.

Anywhoo, I found out the the drivers side injector is leaking around the top and flooding out the engine. It even leaks out when I disconnected it and had my wife start it. That's a symptom of a faulty O-ring right? I'm hoping it's not a faulty injector but since I disconnected it and it still dribbled out, I kinda doubt it.

Sorry if this sounds noobish, but I've gone through hell with this truck this summer and I'm kind of paranoid right now.

 

[mrdrinksalil]

Buy this..
http://shop.advanceautoparts.com/we...it-BWD_5115809-P_2355_R|GRPFUELAMS_1733072750____

If the injector is leaking from the top you have an oring/backup ring issue. Every time you take the injector pod apart you most likely will damage the gasket but you must have damaged your top oring on install.

If you do need an injector hit up the junkyard(~$5 here). They are $50-80 remanufactured. You can test them in the junkyard with a 9V battery. Just touch the battery to the injector connector pins and if the injector clicks the solenoid is good. You can't see the nozzle without taking them apart but if you have a good spray cone (use a timing light) its good to go. If you pull the injector pod apart in the junkyard and its all nasty in there leave it and keep looking. The part number is stamped in the top of the injector.

Injector sizes-
Color code Black/White
Engine 2.8L
Flow lbs/hr @ 13psi 33
TBI bore 35mm
GM part # 5235430

Color code Yellow/Blue
Engine 4.3L
Flow lbs/hr @ 13psi 45
TBI bore 43mm
GM part # 5235203

Color code Green/White
Engine 5.0L
Flow lbs/hr @ 13psi 40
TBI bore 43mm
GM part # 5235279

Color code Orange/Black
Engine 5.7L PU
Flow lbs/hr @ 13psi 55
TBI bore 43mm
GM part # 5235206

Color code Yellow/Brown
Engine 5.7L CopCar
Flow lbs/hr @ 13psi 65
TBI bore 43mm
GM part # 17084327

Color code Blue/Black
Engine Late BB PU
Flow lbs/hr @ 13psi 80
TBI bore 51mm
GM part # 1708430

Color code D Red/D Blue
Engine Early BB PU
Flow lbs/hr @ 13psi 90
TBI bore 51mm
GM part # 5235231

 

[MT86K5]

Also make sure you dip them in ATF before you put them on, I'm sure you did that though.

 

[Burbdood 74]

Also make sure you dip them in ATF before you put them on, I'm sure you did that though.

Huh? Do the O-rings need to be dipped in ATF or are you just messin' with snuffsquatch?

 

[British Slave]

Put some type of lube on them.

 

[Burbdood 74]

Put some type of lube on them.

Well, after reading this I went and hunted down the instruction pamphlet for the injectors. One of these days I'm gonna learn not to just dive in and do a project, but actually read the damn instructions.

So I'm off to get new O-rings for both injectors and I will lube them up before I install them.......

Thanks for all the replies guys. Now I need a good slappin'.