After Market ECU - Which One, How Much & Why

[Okibi]

To make it easier to look at your options, you need to check if your 95 has the 1.6 style plug on the ecu or the 1.8 style they swtiched to some time in 95 (i think).

[93_Clubman]

To make it easier to look at your options, you need to check if your 95 has the 1.6 style plug on the ecu or the 1.8 style they swtiched to some time in 95 (i think).

okibi, i think so too...

jbt, i think you'll find this was when they went from obdi to obdii - if so, then i think you'll also find that your vin will show you this, i.e. jmona30p3... (sep '93 build - oct '93 compliance na8) to jmona30p4... (? '95 na8).

btw, if checking your ecu then, from memory, look for a block containing 13 connectors & a block containing 8 connectors - these are side by side & look like one large connector block but there's actually a divider between the two on the wolf plugin. the wolf plugin then also has 11 & 6 pin block for the 1.6 along side the aforementioned 1.8 plugin.

[JBT]

Thanks guys. My car details are:

built 01/95, compliance 3/95, VIN is JMONA30P400........

This Wolf (or another?) plug and play ECU looks like the way to go. I have no idea what my ECU plugs look like 93_Clubman but will ckeck it out at a later date.

Anyone got a pic of how my ECU plug should look to be compatible with the Wolf plug-in ECU?

[Okibi]

..Anyone got a pic of how my ECU plug should look to be compatible with the Wolf plug-in ECU?

Like this I think

[Okibi]

http://wolfems.cart.net.au/details/106285.html

This ECU is designed to plug into Mazda MX5 model vehicles up to and including 1995.
All Wolf V400 PlugIn ECU's are designed to allow the Mass Air Flow meter to be removed. The internal MAP Sensor allows boost levels up to 23.5 PSI. If higher boost levels are required, an external MAP Sensor can be used.

[Okibi]

Here's a pic I found of an NA6 ECU

[Okibi]

[JBT]

Thanks Okibi. I'll study and digest.

[JBT]

Dumb questions.

Two statements below:

All Wolf V400 PlugIn ECU's are designed to allow the Mass Air Flow meter to be removed. The internal MAP Sensor allows boost levels up to 23.5 PSI. If higher boost levels are required, an external MAP Sensor can be used.

PIE Kits come with a base map pre-set but we strongly recommend dynotuning to check your car's air fuel ratios. More tuning is required if you have other modifications.

Are these two \"maps\" different things? I'm familiar with Manifold Air Pressure but the \"base map\"?
How does it get an airflow input if the AFM is removed?
What do the dyno tune people use (PC, screwdriver, what?) to adjust the ECU when \"tuning\"?

[Okibi]

You can keep your AFM with the Wolf but it can be restrictive, you can chose to run Manifold Air Pressure, the wolf units have a metal barb on them that you can run a vacuume line to.

The \"pre-set\" map is a Pre-Set Fuel Map.

They're tuned with a PC and software.

[93_Clubman]

Anyone got a pic of how my ECU plug should look to be compatible with the Wolf plug-in ECU?

Like this I think

You're right Okibi - had a look at my '93 NA8 factory ecu today, in particular the two wiring blocks, & there are two rows of 13 contacts on the block on the passenger-side & two rows 11 contacts on the block toward the driver-side. Which means when the Wolf is installed the blocks no longer sit side by side - the block on the passenger-side connects to the far lefthand-side block in the above picture & the block toward the driver-side connects to the far righthand-side block in the above picture leaving the two middle blocks empty. FWIW, my factory ecu has the following markings, amongst others, on its black & white sticker: BPF6A & BPF6.

According to Garrett, On Board DiagnosticsII (OBDII) was introduced in the US in model year 1996, or 1995 in Aust delivered cars, so it may or may not coincide with the VIN change from P3 to P4, but I suspect it does.

The following might also be useful:

MX5 RWD 1.6 DOHC Pop Up H/L B6 3/89-8/92 NA3061 100001-200000 MX5 RWD 1.6 DOHC Eng B6 8/92-9/93 NA3062 200001-210000
MX5 RWD 1.8 DOHC Eng BP 9/93-12/94 NA30P3 100001-200000
MX5 RWD 1.8 DOHC Eng BP 12/94-11/97 NA30P4 100001-200000
MX5 RWD 1.8 DOHC Fixed H/L BP 1/98-9/00 NB30P1 100001-200000
MX5 RWD 1.8 DOHC A/T&5SPD BP 8/00- 8/02 NB30P2 200001-300000
MX5 RWD 1.8 A/T&6SPD BP 9/02- NB30P3 300001-400000
MX5 RWD 1.8 BP 9/03- NB30P4 400001-

[JBT]

I think the USA model year starts with cars produced in September of the prior year i.e. a 9/94 build = 1995 USA model year car. I'll have a look at my ECU Monday and get a pic if possible.

[93_Clubman]

that would explain Wolf's claim about their plugin fitting upto & including '95 vehicles - fingers are crossed...

[Richee]

I could leave all this for the next owner to mess about with and just upgrade to an SE or NC .

mmmmm NC RHT
go on, you know you want too....

[ZenArcher]

I've been readint this thread with interest, as even though I am trying out Spikey's computer, I am not sure if it is right yet or not. Thanks to work I haven't had the time to get it on a dyno yet.

I am wondering , those of you running the Wolf computer. How does the computer cope with cold starts and when turning the A/C on - in regards to idle up? Is this part of the base map that is supplied - as in it isn't an issue? or does it also have to be programmed into the computer?

I read before someone here who was using a stand alone ecu was turning the A/C off when stopped at the lights and then back on again, once on the move. While others were saying in regards to cold start, that their MX's would start on the third try.

Was considering an Autronic as RussellB has saved his previous maps for his autronic, but I just can't warrant spending 2K on a computer and then more for fitting and tuning. Hence I am looking at the Wolf now.

Are there any other little \"eccentric issues\" with running stand alone ecu's?