You could send your old injectors off to get a rebuild from Cruzin Performance. I did with mine and they all checked out perfect. In fact, they were just slightly off from perfect on the pretest. You'd be shocked how good they probably are.

 

Maybe so, but I got upgrades I still have the old ones btw.

 

We get to page three of thread number ??? and you are just mentioning this NOW??? You replaced the injectors because they were 22 years old??? I wish I was as rich as you are. I keep trying to help you and each time I end up regretting it. You are like a fart in a skillet. Good luck. :

RACE ON!!!

 

I mentioned this before, if not in this thread then the other one before it. Since the car started running badly I have replaced the stock Bosch injectors with new Ford 24# injectors. I also replaced the regulator with an adjustable Holley unit and have it set to 30 psi (factory spec).

I did some more digging up on the MAF and found this on the ThirdGen forum.

"The MAF for an 85 is Bosch #0 280 213 002 and the number is molded into the plastic on the "flat" of the sensor housing. It uses a pulsating digital signal, not the analog signal used on later MAF cars."

Mine was replaced and has #0 280 213 004 on the bottom. It worked fine but maybe having a different part killed it or god forbid the burnoff module. hmmm...

 

You aren't going to make it my fault for not keeping track of all your threads. I try to help numerous people and I can't keep track of everyone's details. Especially when your problems drags out over a period of months. You have to list them for each thread.

Upgrade??? Really? That may be why the plugs are wet and not inconceivably, a partial cause of all your problems. Your chip is calibrated (tuned) for the stock (22 pph?) injectors. Even with the stock fuel pressure, these injectors are delivering more fuel than was ever intended.

If you give partial information the help you receive may only be partially useful. :

RACE ON!!!

 

Well i'm sorry for not giving the full details. Heres a rundown...

Last year I replaced several parts including:
Coolant Temp Sensor
IAC
Cap and rotor, spark plug wires

Over the winter I put new Edelbrock heads on, new bolts, gaskets, the works. I took the car to a mechanic who adjusted my valves, but told me that my fuel pump was failing. I drove it home and sure enough the fuel pump died just before I got to my driveway.

May 2007 - I replaced the fuel pump and filter, car ran great for 2 weeks. I had to replace a busted O-ring on the fuel rail. Couldnt figure out why the car wouldnt run right after that. Took it to the mechanic again. He had it for several months before telling me it was a bad MAF. This was September 2007.

October 2007 - I installed headers and new exhaust. I also replaced the starter with a later style. Car ran great for 2 days, then started losing fuel pressure.

November 2007 - I ohmed the injectors and they were all good, but decided to replace them anyway to improve gas mileage and power. They were replaced with Ford 24# injectors from Injectors4U. '85 uses this size instead of the 22's on later years and runs at 30 psi instead of 40. I kept the original injectors. I also replaced the regulator with an adjustable Holley TPI unit and its set at 30 psi. It has new Denso spark plugs that are gapped correctly and the correct ones for aluminum heads.

I have recently noticed that the MAF that the mechanic replaced mine with back in September is not the correct part, its for '86-'89. I did not know at the time that the MAFs were different.

Now, I just came back inside from tearing down the intake again. Following the info from the FSM I pressurized the fuel rail and none of the injectors are leaking. In fact there are no leaks at the rail, fuel connnections, or at the fuel filter. Yet my pressure still drops after the pump shuts off. I apologize as I was wrong about the injectors leaking. I'm at a dead end now as I have no idea why its dropping like it is.

 

Here's some good info to help pinpoint your bleed off.

I think you said you followed the FSM stuff... did you clamp off the return line to see what happens then? I made a test return line when I was having high pressure issues. That helped me find that my regulator was the issue. This might help you too. You could run a test line off the return and plug it. If you're still leaking and you see no leaks in your fuel rail (o-rings) I'd very much suspect the fuel pressure regulator diaphragm at that point.

 

And, actually, I can ship you out my test line I fabbed up if you wanted to give it a shot. Let me know.

 

Thanks for the offer evmlarry but I tried pinching off both lines and it had no effect on the pressure. I removed the fuel rail with injectors from the car and i'm going to take a closer look, make sure everything is ok. I'm really puzzled on this one

 

The 85 MAF Burn off module (as people call it) actually powers the MAF. It provides power for the MAF "wire" which is always "lit" during operation. When you turn off the engine, the "burn off module" continues to heat the wire (no air flow) to burn off crap that might accumulate on the wire during operation. This for about 10 seconds.

Two years ago I tapped into my MAF burnoff module relay circuit. These modules are basically a relay and a timer. Well, the relay does the brunt of the work, so I adapted an external 30amp relay (radio shack bosch made) to that circuit. Now the MAF burnoff modules only powers the external relay. The relay is located under the dash, within convinient reach of being replaced. I can hear the relay click off about 10 seconds after each shutdown. Relay is less than $10. MAF burnoff module should last a long time. ....I'm hoping.

 

I took the fuel rail off and took a closer look. On the 4 rear injectors I noticed that there was fuel residue on the tops and they felt really lose. After removing them I noticed something. They werent the same length as the originals! Yeah I know should have noticed before when I installed them but I took a picture so you can see there is a definite difference.

 

a separate burnoff module is required for the 85 since the maf units are not the same. If anybody remembers sami, sami L98, I sold him the one I had. Don't know if he had given it up with the car, but I know he had an extra one. besides, didn't someone on the forum just smash up an 85, and start selling parts off it?

 

It was an '84 that got smashed up. I'm still diagnosing the problem, not 100% sure if its the module yet.

 

I was under the impression that the 85 used 25lb injectors.

 

It's hard to see in your pic, is the distance from rail clip to lower O ring comparable ?? Can you remove some material from the rail bolt bosses(on intake base) to lower the rail and get the lower O ring in further ??

 

Sorry to come in so late on this one, but I'll pass along some things I found in my search on this exact same problem on my 85....first, if you have a Holley regulator, don't expect it to hold any fuel pressure when you turn off the key!! I chased this for a long while, before I finally called Holley Tech support to complain, and they told me that the regulator was not designed to hold pressure, rather to bleed off the pressure....others have reported the same, after they gave up and called Holley, as well as other after-market regulators....so, don't spend your time chasing this one..., as far as the MAF...if you have kept the 6870 ECM, then you will have to use the correct MAF for the 85...none of the others will work correctly with this ECM, and burn-off module. I chose to repin mine to a 7165, not only for the upgraded speed of the ECM, but also to get rid of the one-off MAF and Burn-Off Module. A rather painless procedure, that is well documented, and only provided an upside for me. No, I can use one of the other years MAF,s as well as doing away with the one-off burn-off module, and use the two separate relays, that are readily available anywhere...

JMHO.....but I, like you, spent too much time chasing this problem, and I hate to see you tearing you car apart several times trying to fix this....Good Luck.....

Cheers,
Michael

 

Close... 24# Bosch.

 

:o Sloppy fingers, 24 was what I was attempting to type.

 

That is the problem, the new ones arent long enough on top to full seat and lock in. Yes I could probably shave down the mounting areas on the intake but I really dont want to do that. The top of one of the injectors broke off anyway so they have to go back.

 

It could be 24# or 25# that was the reason for the question mark. The the point of the post was that the OE injectors and the FMS injectors are flow rated at different pressures. Regardless of how they are rated, they flow differently. With the same ECM calibration (tune) and fuel pressure it will run richer with the 24# FMS injectors, and that may be the cause of wet spark plugs.

RACE ON!!!