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It's official...(maybe not) *UPDATE*

66gt350

66gt350

Active Member
...I'm going back to a carb. After going back and forth whether to keep fighting and tuning the efi or go back to a carb, the car made the decision for me on the way into work. I got about half way and the A/F gauge went from reading 14.6 to over 30. It started doing the lean sputter and died. After fighting to restart it, it did restart but would only stay running if I feather the throttle. As soon as I let off, back to lean. After getting a ride home on a flatbed, the car started right up in the garage.

So, I think that I'm just going back to my trusty old holley....
 
Re: It's official...

You're making me regret my decision to try and finish my EFI. With all the issues I'm already having trying to get mine done I keep thinking I should just stick with a carb too.
 
Re: It's official...

or you could go with a new system. bolts on like a carb and teaches itself.
 
Re: It's official...

There are things that I love about the efi, like the fuel mileage. But the frustration is driving me nuts.

Now, I just have to see what carb stuff I have left. I know that I put my good holley and intake on Sabrina's mustang. I think all that I've got on the shelf for intakes is single plane intake (plus, an old Offy dual quad tunnel ram). And for carbs I think that I only have a holley 750 dp and a holley 650 vacuum secondary.

Decisions.....
 
Re: It's official...

"RapidRabbit" said:
You're making me regret my decision to try and finish my EFI. With all the issues I'm already having trying to get mine done I keep thinking I should just stick with a carb too.
Click to expand...

Pat is your system modified or stock (I thought you had stayed with a stock system). Not trying to rip on anyone, but the problems arise that have to worked out when you start mixing and matching aftermarket EFI components. They can make plenty more power than the stock system, but they can also provide plenty more headaches too! For the guys can that get everything working good..more power to ya (no pun intended!)!
 
Re: It's official...

Mine is mostly stock. The only aftermarket upgrade is a trick flow intake which came with the engine when I bought it. I also have the original stock intake. if it causes any issues I can swap it out. I've got a date with my car in two weeks for some quality garage time.
 
Re: It's official...

The major headache that I've been dealing with is the E303 cam. It's notorious for creating a surging idle. It creates a rich environment just outside of what the stock computer can handle. I got so it wouldn't die at stop signs anymore.

It was going better since I've done some work to the MAF airflow curve. But this morning has me baffled. It starts right up now. No issues.

Sent from my XT912 using Tapatalk 2
 
Re: It's official...

I have the E303 with a Performer intake and Holley 600cfm/vacuum secondary and the car runs great....so much so that I scrapped my plans to add a Pro-jection system to it.

my 2 cents
 
Re: It's official...

Rob:

I have a few carbs sitting on a shelf out in the garage. IIRC I have a Holley 600 dp with electric choke and an Edelbrock Thunder AVS 650 with manual choke. Let me know if you could use either.

Regards, Jeff
 
Re: It's official...

"66gt350" said:
And for carbs I think that I only have a holley 750 dp and a holley 650 vacuum secondary.

Decisions.....
Click to expand...

The 650 Vac should be perfect with the E cam. I ran a 12.87@109 with a 650 DP and the F cam.

Robert
 
I'm still baffled. I head out to the garage tonight to start ripping and tearing out the efi, when I thought I'd read the computer codes even though the "check engine light" didn't light up. It came up with two codes 34 and 96.

34 - insufficient EGR flow or EVP voltage high (SONIC) or PFE sensor voltage high or out of specification
96 - Fuel pump secondary circuit fault / high speed fuel pump relay open

Code 34 makes sense. I'm not running an EGR and I have it disabled in the computer. Plus, I'm using it to datalog the wideband O2 sensor. This is a common thing to do, so it's not my problem. Do this could see some strange voltages.

Now code 96 could cause my problem. I can't see any loose wires or connections. I took the fastback out for a test drive with no issues. I even opened it up when I got onto the highway. After shifting to 2nd, I put the hammer down. Figuring that would be the time if something was going to happen, it would happen. Got home with no problems.

I think that I'm going to drive it awhile to see what happens. Hopefully, I'll make it to work tomorrow. I'd hate to have to call my boss two days in one week that I'm broke down by the side of the road. I'd never live it down.

"JeffTepper" said:
Rob:

I have a few carbs sitting on a shelf out in the garage. IIRC I have a Holley 600 dp with electric choke and an Edelbrock Thunder AVS 650 with manual choke. Let me know if you could use either.

Regards, Jeff
Click to expand...

Thanks Jeff. I'll keep that in mind if I'm sitting on the road side tomorrow morning!!
 
Re: It's official...

"RapidRabbit" said:
... I've got a date with my car in two weeks for some quality garage time.
Click to expand...
you've only got about two months to have it running and debugged.... just sayin' :roll

how do you E303 cam owners like them? I have one in my 5.0 but haven't fired it yet. I have a 600 Vacuum Secondary and a 750 Vacuum Secondary Holley. No intake yet.

On the EFI, my buddy with coupe to FB conversion has an 87 5.0 with EFI all stock. He wants to put it in the car stock...
 
Re: It's official...

"tarafied1" said:
how do you E303 cam owners like them? I have one in my 5.0 but haven't fired it yet. I have a 600 Vacuum Secondary and a 750 Vacuum Secondary Holley. No intake yet.

On the EFI, my buddy with coupe to FB conversion has an 87 5.0 with EFI all stock. He wants to put it in the car stock...
Click to expand...

Craig,

Before I swapped over to efi, I was running the E303 cam with a Torker II intake and holley 650 dp. Along with the twisted wedge heads, I loved it. The car was very responsive and alot of fun to drive. The E303 cam with efi, is another story. It's just hot enough that the stock computer has problems with it running rich and causing a surging idle. With efi, the car down right moves. I have problems getting the power to the road and not lighting up the rear tires.

Your buddy with the 87, IIRC that's a speed density car, not mass air. It's tough to do modification to a speed density setup. Most convert over to mass air.
 
Thanks. I bought the 5.0 short block with the E303 cam already in it. It's going in my 65 with a T5. I am planning on a carb. I have an Ultra-lite Distributor.

My buddy bought the whole car (Lincoln) and we stripped it. He wants to use it as is. I've tried to talk him into a carb because he is too "cheap" to buy a wiring harness. Neither of us has ever converted a car to EFI so it should be fun.
 
We are running the E303 cam in the Ford 306 crate motor with EFI. Running a Ford Motorsports Cobra intake, 30 lb injectors and a 75mm Pro M mass air meter and a Pro M retuned stock computer. The engine starts, idles, and runs amazingly well. Using a oldfuelinjection.com harness with an egr eliminator built in, it was a simple install and very basic. Nothing too wild! Only problem so far is that it won't run with any aftermarket distributor. Seems to really like the stock Ford unit.

I would do it the same way on my next 5.0 build. And I do not plan on building another carb'd engine again.

For a first time EFI install I even impressed myself.
 
Re: Re: It's official...(maybe not) *UPDATE*

"kb3" said:
We are running the E303 cam in the Ford 306 crate motor with EFI. Running a Ford Motorsports Cobra intake, 30 lb injectors and a 75mm Pro M mass air meter and a Pro M retuned stock computer. The engine starts, idles, and runs amazingly well. Using a oldfuelinjection.com harness with an egr eliminator built in, it was a simple install and very basic. Nothing too wild!
Click to expand...

Thats the wiring harness I used too. It was very easy install. Only problem was its only for mass air setup, and I had speed density too. So I had to convert over. Locating the computer for an automatic was the hardest part. Of course I still have no idea if its all going to work.
 
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