FD from Hell!
 

I have a "93FD" modifications...Mazda reman engine, GT35R, street port, 850 primaries, 1600 secondaries, PFC, and so on.

Problem is, katrina flood damaged car, some shop did the engine swap. A friend and I at my shop did the complete harness swap because blinkers weren't working, lights weren't working and so on.

Engine started up before the harness swap, drove up and down the street, seemed ok with the stock PFC tuning. After the swap, started up, sputters a bit and somewhat gray/bluish smoke, it will take off in first gear but it will lose power when you shift to second.

Check for boost leaks, secondary injectors leak at 6PSI. I don't think it should be that big of a deal, but I need help! :wallbash:

Useless post.

Why are you trying to boost your car with the basemap that is distributed with a PFC when you are running not only a single turbo, but 850 primary's and 1600 secondarys... is it not obvious that your car is going to have problems?

Get your car tuned

man i now the engin has les than 100 miles on it THE problem is that it dosnot drive

engrish

engrish ?

means your english is so bad, it's impossible to know what you're trying to communicate.

Anyway, whatever you said is a moot point. You don't boost on a new motor, and you don't boost on an untuned ECU. Breakin your engine, get tuned then try to troubleshoot problems.

Ok, he is trying to break-in the engine, not drive it or boost it! He knows the PFC needs to be professionally tuned, but first they need to properly break-in the engine, which we can not do because the car hardly drives. We would appreciate some help in order to at least get the car running so we can break-in the engine then get it tuned.

PS. No, we did not try to boost 6psi while driving the car, the boost leak test was performed with the engine off, by pressurizing the system artificially through the intercooler piping.

Stock PFC tune isn't drivable with those mods even without boost.

thewird

probably stating the obvious but just in case...
did yall adjust the injector sizes in the pfc...

the PFC doesn't recognize 1600cc injectors without a datalogit anyway...I think the highest it goes is 1300 or 1400...

^^ Qft

Changing the injector size, doesn't change anything lol. You actually have to tuuuune it

thewird

The reason why we are posting this is because the car was "driveable" before the harness was changed... as in, you could normally drive it up and down the road, but now as soon as you shift into second gear... the car runs like crap (kinda like limp mode, a little smokey).

About the PFC:
The car was built by Rx7Store, and also the PFC was tuned with this setup by Jason @ Rx7Store as well. As I said, the car ran fine before the harness was changed (harness was changed because blinkers and other things did not function because car was in a flood).

PS. car is not driven above 3,000 so secondaries should not be an issue.

The OP mentioned stock PFC tuning. He has mentioned 850 primaries which aren't stock. If what he mentioned is true, the car is running rich. Pull the plugs and take a look.

thewird

You can turn it up to 1500cc on the commander. And the secondary's are NOT being used to just start the car and drive it around staying below 4,000 rpms and NO boost. God there is alot of mis-information in this thread from a bunch of NOOBS. Please don't give out false info, like the statement you just made above.
Thank You.

That was unnecessarily harsh.

Why not call Jason @ RX7Store. I'm sure he wouldn't mind helping.

Nah I had it coming. For as much shit I give out, I was bound to get some for posting a half truth lol.

But for the record, I never said he was using his secondaries, I said the commander does not have a driver for 1600s (1680s), sorry for not knowing the largest supported injector without a datalogit. I wasn't telling the guy who screwed up his car, I was talking to amp.

Even with the datalogit, changing the injector size is only for note purposes. Changing the lag isn't going to make a big enough difference.

thewird

The PFC has already been tuned for this setup at Rx7Store by Jason, and the car ran good before the harness was swapped, so I was wondering if anyone had any ideas besides the PFC not being tuned that could lead to these problems. Let's just assume the PFC is tuned correctly and something else is the problem.

HE just says that everything ran ok with before harness swap.
Then he swapped the harness and now it smokes and sputters....


What harness are you talking about ricardo?

Did you consider the fact that you guys installed the wiring harness improperly??? Seems like the most plausible cause and based on the fact that the OP would post such a vague but simple question points me in the direction to believe that he is no where near capable of installing a harness properly.

Ok, what you are saying is unnecessary and obvious. If you only know how to insult people don't bother posting at all, because it's not helping!

The harnesses that were replaced were the front harness and the emission harness (to my knowledge). We know that when the harnesses were changed, something went wrong... but now we are trying to figure out what, without having to change the harnesses again.

Although the previous statement was about the obvious, sometimes it is often the obvious that is overlooked. I am guilty of doing that a time or too just like most everyone else here on the board.

That being said, as painful as it is I would have more than one person go over the harness install. Sometimes if you are the closest one to the problem it is hard to see where the problem is coming from. Check and make sure all harness grounds, motor grounds are properly done. Check all connections, all other wires that could have gotten bumped, moved, scraped or anything else during the install. It may not be the things that are new, but something else that got jostled in the process. Go through the vac lines. If everything went south after only a harness swap it has to be a stupid problem that is directly associated with the swap. Hopefully this will help.

And the the OP, you need to be MUCH more clear on the whole situation and list all pertinant information if you really expect anyone to be able to help you. The info on the tune already being done with this setup was critical information....

have you ran through the sensor check on the commander, (if you have one) and checked the important sensor voltages to make sure they are in check? Check PIM with the car off key on as well as with car running.

Next verify you have spark on all 4 ignition wires.
Is the car running on both rotors?