crzyone wrote:Well, good news. The dead cylinders are getting a signal to the injectors. The non working and working cylinders are all getting 6V at idle.
So this narrows it down to an injector or spark issue. I'll pull the front coil pack tomorrow, look at the spark plugs and maybe rig a way for me to check spark. These 1 peice coil pack covers are a bit of a PITA.
Are the coil packs interchangable bank-to-bank?
If you can, just swap the suspect coils/pack to different cylinders and see if the problem moves.
Also a good suggestion. I will check the injectors to verrify if they work and if they DO, then I will start chasing a spark issue. Swapping coil packs would narrow down a coilpack problem.
CincinnatiFiero wrote:IMO the tint and the Falken wheels made your car Levi, doesn't look as bad ass when it had the older rims on it.
Thanks for the compliment. I like the black/red look. It does look more agressive than when it had the other rims. The staggered 17" and 18" wheels help with that look as well.
Tried pulling off the front coil pack today, all it resulted in was white hairs and bleeding hands..... Can't get it off unless I drop the rear of the cradle to give me more room to remove it. My next days off I will do that.
I called around for injectors, by the time I found a place they would be closed by the time I got there. Maybe on my next days off....
Ok, wife cranked the engine while I watched the injectors, and they are spraying just fine.
This explains why it gets 13mpg... burning the fuel of a V-8 but only running 6 cylinders with a bad tune.
So, its looking like a coil pack, spark plug, wiring or ecu problem now. Atleast the fuel system is no longer suspect.
I compared the spray patterns with known good cylinders and the dead cylinders, all look great. Nice pattern, more of a puff of fuel than a leak. Good atomization happening.
The O2 would still read lean even though its getting proper fuel. If the fuel is unburned then there is still an abundance of oxygen in the exhaust.
I can't see it being a wiring or ecu problem.... You would think either the coil pack works or doesn't. All 4 would work or wouldn't. Makes me suspect the coil pack its self or the plugs....
p8ntman442 wrote:try removing injector clips one at a time on the suspect bank. can you not get to them?
When on the dyno we pulled one clip at a time. All but 2 made the engine stumble and run rough(er). The front left cylinders made no difference wether they were plugged in or not. Now that I know they are spraying properly I have to track down other problems.
p8ntman442 wrote:isit possible those two clips got swapped and your injecting at the wrong time?
While this is entirely possible, it wouldn't have this much of an affect. He's missing like 80whp. And the difference in the 93 and 94 3.4l cars, when the only thing changed was the SFI, was not 80whp unfortunately.
88GT 3.4 DOHC Turbo
Gooch wrote:Way to go douche. You are like a one-man, fiero-destroying machine.
p8ntman442 wrote:isit possible those two clips got swapped and your injecting at the wrong time?
While this is entirely possible, it wouldn't have this much of an affect. He's missing like 80whp. And the difference in the 93 and 94 3.4l cars, when the only thing changed was the SFI, was not 80whp unfortunately.
not to be rude but hes running a BS3 not a 7730. Do you know how the board architechture is designed? I dont. All Im suggesting is that 2 bad cyls could be a driver problem. checking the wires is easy. It could also be a fucking head gasket problem.
"I wanna make a porno starring us. Well, not just us, also these two foreign bitches."
p8ntman442 wrote:
not to be rude but hes running a BS3 not a 7730. Do you know how the board architechture is designed? I dont. All Im suggesting is that 2 bad cyls could be a driver problem. checking the wires is easy.
A BS3's injector drivers are no more complicated or advanced than the factory SFI ones on my 3.4. By him switching them, even if he did, it'd run those 2 cylinders like MPFI, which doesn't make much less power than SFI, if any.
88GT 3.4 DOHC Turbo
Gooch wrote:Way to go douche. You are like a one-man, fiero-destroying machine.
You've ruled out injection. Regardless of when it injects, as long as it injects, it will run fine. I don't think the chances are hgh that you have 2 failed coils. (I think the 2kN* has 5 wires, 1 to +12, 4 grounds for the individual coils, no?)
Most likely, you have 2 coil wires reversed. You could have a cylinder firing 270 degrees too late, which would put it near the exhaust cycle. It would make a hell of a racket, but it wouldn't do anything for power.
(future SBC mod?? Patent pending.)
Also possible is a BS3 fault. Either in the software/firing order, or hardware.
The BS3 harness was complete, as far as coils go. I didn't have to do any wiring myself, but I'm not going to rule it out. This BS3 has been a nightmare since day one.
I am working for the next 7 in a row so I won't be able to look at it any time soon. I see there are some coils on ebay right now, might pick one up and a few spark plugs and hope for the best.
Yes... the harness didn't come with a wiring diagram, just a pinout of the ecu. Going to be a PITA to figure out the wiring if it is the culprit.
Going to buy a coil and plugs. Will cost me $100 and rule them out as being the problem. I guess its common for the metal contacts on the coils to rust and not conduct properly. When I drop the motor and yank the coil I will see what kind of condition it is in.
crzyone wrote:Yes... the harness didn't come with a wiring diagram, just a pinout of the ecu. Going to be a PITA to figure out the wiring if it is the culprit.
....umm, no. Just plug the plug at the ECM and the injector, measure with a meter (one lead at the ECM plug and the other on the injector), if you have good continuity from the pin on the ECM that is going to the correct injector - then it is good. If going to the wrong injector, then that is bad. There should be power on 1 wire at the injector (key on) and the other wire should go to it's correct pin on the ECM. It should take you less time to do this check than taking the car apart to get at the connectors.
Can do the same thing to check the wiring for the coils to ECM connections.
crzyone wrote:I guess its common for the metal contacts on the coils to rust and not conduct properly.
Maybe you can put some nonconductive grease there to keep the water out??
crzyone wrote:Yes... the harness didn't come with a wiring diagram, just a pinout of the ecu. Going to be a PITA to figure out the wiring if it is the culprit.
Well you know which 2 cylinders aren't working properly... I think I have a Y2kN* wiring diagram on my other computer. I'll see if I can post the coilpack wiring. That should be the only thing you need.
