Got my new RX7 - Please help with problems!

[A7NTY]

Got the car it is awesome, seems really clean BUT, it has a few little problems.

It has an Apexi power FC, HKS induction, big exhaust rear section, blitz front mount intercooler etc. However it has a couple of faults.

Its fine driving with less than half throttle, but when you get the boost nice and high the boost fluctuates from about 0.8-1.0 bar which seems a little odd makes driving feel weird.

Also a few times when pushing it hard some of the warning lights have come on I think this is to do with the Power FC, at one point I was giving it full throttle and it kind Jolted badly as if it was cutting out and the coolant/overheating light came on although temperature was okay, I think this is power FC. Was this detonation?

Injector duty is high I was getting 91% so I think it needs bigger injectors and fuel pump, next improvements on my list.

Anthony.

[JayDee]

check your boost settings, the duty may be to high and it is hitting fuel cut. You are allowed to run up to .25 over the set boost.
Where in the rev range does it fluctuate

[A7NTY]

It only seems to fluctuate after the second turbo has cut in about 4500-5000 rpm.

I have tried knocking the boost down a bit on the Power FC.
But I will have another go.

Anthony.

[JayDee]

There are two numbers for boost control on both primary and secondary boost.
The first number is boost in kg/mm
The second number is duty cycle %.
If boost goes higher than preset target your duty cycle % is to high and needs to be a lower number.

[A7NTY]

:reallymad

Just started the bloody thing and its misfiring like mad, wont idle etc. we suspect plugs are the problem, we are removng them at the moment. It has some very serious ignition leads so I doubt they are the cause.

Cheers for the advice on the boost I will try to lower it and then test the car.

Anthony.

[kevint]

Probably worth taking it to a specialist to check over the car -  //www.rxmotors.co.uk is your closest.

Kevin

[A7NTY]

RXmotors have got me some new spark plugs to try, should hopefully fix one of the problems (the misfiring) then I have just got to sort the other problems!

First impressions from driving - its an amazing machine - very very quick, steering feels very nice, response is good etc.

With injector duty at 91% the car must be making around 350bhp which is pleasing, its a really beautiful example - once these intial problems are sorted this car will be a gem!

Would post on FDUK, but I am not even recieving posts anymore so I dont know what on earth has happened there.

Anthony.

[maximtaylor]

Hi Anthony

What\'s your id on fduk??

I\'ll try to get you back on by kicking the right people

Regards

Max

[A7NTY]

I think my yahoo groups username is AJ00F

Anthony

[A7NTY]

RX7 - Fixed!

Lowered the boost slightly, now making 0.8bar, much better, smoother and you can floor it big time.

Misfire now stopped, looks like a dodgy connection from a lead to a spark plug was the fault, I have put new plugs in and have ordered new leads to go in it although it seems okay right now.

I have ordered bigger primary injectors and an uprated fuel pump.
Spending on this car is now getting near £3000 and I have only driven it once properly!

Its a real beast, definetely going to be the Sterte Garage show car! Driving experience is very impressive.

Awesome to drive once properly fettled I expect it will be making circa 350bhp or more! Will get it dynoed once it is all done.

Anthony.

[JayDee]

Glad it is all sorted.
You maybe better off with larger secondaries, but 850 primaries can work well, with the pfc

[A7NTY]

I may fit bigger secondary\'s if they are needed aswell. We shall see!

Anthony.

[bnaellis]

Well done mate,

You only need bigger secondary injectors, how is the total 3k already surely not for fuel pump and injectors ?

rgds

[A7NTY]

Okay well here we go;

Apexi AVC-R,
Apexi RSM,
Apexi Fuel pump,
4 new Goodyear f1 tyres,
Alpine 15" type R subwoofer,
Cusco front strut brace,
850CC primary injectors,
Alpine 900w subwoofer,
Alpine MP3 head unit,
Spark plugs,
Magnecor leads.
Uprated radiator - 100% bigger than standard unit.

Maybe not £3000 yet, I must have been getting carried away! but getting on that way.

Mods the car came with;

Twin or triple plate clutch,
Blitz front mount intercooler (6" deep)
HKS RS induction kit,
Enormous exhaust rear section (about 5,1/4 inch exit)
Lowered suspension.
17" Enkei wheels,
Greddy gauges x3,
Apexi Power FC & commander

probably more but I cant remember it all right now!

Anthony.

[Iwan]

Hi Anthony,

where did you bought your radiator? @WGT? Did them charge you 500 bugs?

Iwan