i've fitted tt injectors to my na zed and it wont run. its starts, idles and revs on an standard tt chip but not on the uprated chip, i've used 2 different chips and nothing, the ecu is fine and have checked the loom and cant find any falts. Run a diagnostics with the standard chip and it came up with 55 which as far as i know is no falt found but with the uprated chip the light comes on and stays on, doesnt flash at all. if anyone knows what the problem is or could be please let me know because im all out of ideas on this one! :helpsmilie:

You say uprated chip, it depends how it is mapped it might be overfuelling.

TT injectors on an N/A runs on the TT chip, what more upgraded are you after lol.

 

By the way im no expert on this subject, its just my observation and having an N/A myself wonder what the benefit would be if any.

 

Graham

wouldnt give much of an increase, about 12 bhp. the na injectors were on their way out so seemed like a good idea to upgrade as tt injectors are easyer to find.

wont even idle on the uprated chip for some reason but does fire?

So why not run it on the TT chip? or get a chip from John Dixon mapped for the mods you have, it will more likely match the set up.

tt chip would overfuel and end up washing the bors out. Got my 1st chip from DTA so its a reliable source and the 2nd from someone my mechanic knows who specialises in mapping, dont know what company though

I see what you mean, im sure its been done before in the US with success, i will see if i can find any posts on the subject

nice one! cheers dude!

Right ive been on the US site and basically it all boils down to the reprogramming of the ECU, which you already know. Its down to the CC of the injector which is main thing that needs programming for the chip. I would say that the 2 chips you have already tried have the wrong cc parameters and not supplying enough fuel to the injectors and obviously the TT too much. HTH although you may already be aware.

 

Most posts state that there is no point in going to a TT injector on an N/A unless using NOS or running higher horse power, although they also say that it wont be a problem as long as the ECU is rechipped.

 

Graham

Top advice thanks! :thumbup1:

one thing though why wont the light go out on the diagnostic? it just seems that any chip other than a standard tt chip wont start it????

Either a prong on the chip bent, dodgy solder or incorrect info, or not uploaded properly onto the chip.

Have you tried the original N/A ecu?

The fueling will be the same as its used to even though it has a bigger cc injector

wouldnt start on the na chip ether??? cant be a bent prong as used 2 different chips and it runs on a tt chip so the soldering should be ok, its the original ecu by the way, soldered in a socket which the chip fits into. did nissan program of their ecu's to only accept nissan chips?

No idea, John Dixon or Andyp will be the best to ask about chips