My FiTech isn't perfect but I don't have any issues like that. I believe my issue to be with the dual plane manifold more then the unit.

You issues sounds like an electrical issue. I'm sure you double checked all the connections and make sure they are solid and good. Are your settings staying after the unit keeps rebooting?

I wouldn't dream of going back to a carb after having FiTech, maybe that new Holley Sniper....

 

Settings were saved even after all these rebooting. It could be the other half of the 6 prong connectors that's causing my issue but that is not replaceable since they are connected to the TB. The tech knew about the overheating of the connector issue since that was where he had me check and told me how to temporarily fix it to get the system running again.

Thanks

 

What kind of connector do they use? Maybe changing the connector to a "better" setup would be a benefit? Maybe something like this?

 

if its a lemon, maybe you can get them to do an exchange ?


Z

 

I never had any issues with my harness but maybe i got lucky. If you do get it narrowed down to that harness connection then it wouldn't be too hard to wire in a new connector(s). Wouldn't be pretty but it should eliminate any issues with that original connector.

Could see if they would send a new harness end for that connection, there has to be a way to disassemble that connector and replace the housing/insulation without cutting the wiring itself.

My initial guess is maybe a bad hand held. The fact the settings are saved makes me think that the TBI unit is working and maybe a bad signal from the hand held to the TBI causes the random shut downs.

Doesn't really explain that odd idling issue though.

 

Woodchuck, those are very similar to the ones in the FiTech.

Zray, not sure how to prove one way or another that I got a lemon.

Boom, this is my second handheld. The first one restarted on its own too but never shuts down the engine when it happened.

Thanks!

 

From the sounds of your issues, something is obviously amiss. You could look into their warranty and see what options you have.

What model FiTech do you have?

 

Have you seen this well-run forum on this well-run Chevy site? FITECH EFI TUNING tips, info sharing, ideas, settings, etc... It's 111 pages long at this point. One guy in Europe is offering a reward if someone can figure out his problem. I see on page 111 someone with a FiTech in a 1969 Mustang has just joined the Chevy forum but he's only read up to page 40 so far. There might be some good info there.

 

I just got my FiTech running about a half hour ago. And I can only offer a few initial observations. The wires and connecters are really small. No way would I trust that tiny 16 gauge orange wire to run the pump in the Spectra tank, so I ran a relay. This evening the controller screen kept going white as I tried to start it.So I ran ground from the battery to the FiTech base plate. No white screen and it fired right up. I guess everyone was right about the ground wire thing! I probably won't have any drivability info until March or April as it's 10º and salty outside.

It seems these things are awesome or crap. Hope we can find a way to them awesome!

 

What kind of intake are you running? I've heard of people having issues when using dual plane intakes and that style EFI, apparently they like single planes.

 

What happens when you don't have the handheld connected? Testing that might help in trouble shooting.

 

Per FiTech's website it says their EFI unit can be used with either a single or dual plane intake manifold. Sounds more like an electrical problem to me too.

 

In Light of all the difficulties, I'd think you would be justified in asking for an exchange.

Z

 

Boom, it's been a little over a year so warranty way over.

Couger70, will check that forum. Thanks!

Nailbender, I'm sure you'll be fine. Seems like a lot of people are having good success with the FiTech but there are a few, myself included that are not doing so well with it. Yeah, tried installing a relay before for the fuel pump but didn't work. Must have had my wiring wrong.

Happystang, I have the Eddy RPM intake so dual plane.

JSHarvey, don't really need the handheld after initial setup other than to monitor the data.

Mustang65BK, thanks for the info. FiTech never cared before when I called so figured intake wasn't a concern.

 

Zray, I'll see if that's possible when I call them for support.
Thanks

 

The dual plane intake won't cause the issues you're having currently, it's definitely an electrical issue somewhere. You could maybe take all the wiring off (a chore, I know) and then re-install it as if a fresh install, maybe change the locations of the grounds. See if that helps.

Does anyone else local to you have a Fitech? Maybe you could borrow their hand held and see if that helps/fixes the issue. that may help narrow down the problem area without too much trouble.

 

Boom's idea of reinstalling the electrical is a very good idea! Add dedicated grounding where you can.

 

Boom, I'll redo the wiring again but I have a feeling it could be the connectors again or the wires to the TB.

I don't think the handheld is causing the system to shut down. It's just showing me that it has shut down. The first handheld I had rebooted while I was driving many times before they replaced it but it never cause the engine to shut down.

74Rallye, yeah, will try that. I already have a dedicated ground from the battery to the TB.

Thanks!

 

I dont have FITech but I do have FAST ez2.0.

All the grounds need to terminate at the same place or you will have a voltage off set that will cause many problems.

Are you using FITech for the ignition too?

MSD sells a noise filter (capacitor) that wires into both the positive and ground of their ignition box power wires,I had to install one when I installed Vintage Air AC because if caused the system to go nuts. I did the AC first,when I did the EFI I had none of the electrical gremlins others had at the time.

For your problems I would terminate every ground together then run a wire to the battery,also run a ground from battery to engine block,at least a 1ga., then another from the engine to the body,at least 10ga.
For the power the wires for 12v pos (or main) right to the battery. Then ensure your key on power stays on during cranking AND has 12v (at least) while the engine is running. If the key on voltage is intermittent the computer will cycle on and off. If the ignition switch is bad or intermittent it can cause all sorts of problems.

 

Man, sorry to hear that you're having issues! That is crazy.

I've been keeping an eye out for a new EFI system. My Powerjection system has been downright awesome for 4 years and 35,000+ miles, but it really can't compare to the new throttle bodies coming out in terms of ease of tuning / overall tunability. I learned that the company also recently stopped supporting this unit entirely (and killed off their very helpful tech forum at the same time) so that's kind of left a sour taste in my mouth. FiTech has been a good candidate to me - interested to see what you end up finding out.

 

Cyclone03, no not using for ignition. On the FiTech, the only grounding is on the TB which I have wired directly to the battery. I'll check the key on voltage.

Thanks

 

Kelly, hope I'm not discouraging anyone from going to the FiTech. It could just be me or I got a lemon. Will see if FiTech have any insight. Tried to call them on my way to work but was on hold until I got to work so I hung up.

Thanks

 

if it were me, i would run power and ground directly to the battery for a while and see if that helps out. i hate electrical because one thing always hems up another.

 

I have had a couple small issues with my installation, and each time I called FiTech and walked them through everything they said the problem is most likely with something I did...and you know what they were right. I have my 12v and constant power on a separate fuse block to take out any of the potential issues that can result from running it through the stock old wiring harness. I also soldered connections where possible too.

Also, how much tweaking have you done to the program- perhaps too much? have you tried just resetting the system to start over?

 

Bdub4u, I have power and ground going straight to the battery. Wires are much larger than the ones from FiTech.

Coolblue65, Will try them again. Didn't pick up last time. I haven't tweaked it much since I reset the system few months back so almost stock settings.

Thanks