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Discussion Starter · #1 ·
The good news is auto tune is going great, I have been steadily building up to using more and more throttle and revs (very restrained for me!!). Afr's are looking good, were very lean.
Issues-

1. The map pressure guage in ts never goes above 90kpa (exactly)?? None of the map above this has been aytotunes also? Should be going higher than this?

2. Earlier when starting there was a pop when ignition on(not yet cranked) and a burning smell. It then started fine.

3 sometimes it starts very very well (more often than not), once it has taken a few cranks, but a couple of other times the stater has stopped cranking whilst for a couple of seconds, then the engine turns slowly then starts, (fooked battery?). The afr's at idle can go from great(13ish) to very lean (16ish). Obviously at cold start, but sometimes while driving and pulled up (again, it's fine more often than not).

What u lot think? The 90kpa thing is worrying me

mini m45, I/c, dual tb, megasquirt, rx8 injectors 11% reduction pulley.
 

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Number 2 is a backfire out the intake caused by your squirt triggering the spark ouputs when the CPU is booting up - joe perez improved spark mod solves this! Did for me atleast...

Number 3 sounds like kick back caused by the fuel igniting before it should, your timing setup ok?
 

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are you boosted ? 90kpa is almost acceptable as 101kpa is accepted atmospheric at sea level.

Infact re-read that.. is the bypass permanently open on the charger ?

It should open when idle.. close when engine off and close when accelerating.. if it aint closing you have the vac hose for it plumbed wrong
 

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just my 2 pence worth..

Mines at 98kpa, anything above that is boost...(suck eggs)

Get yourself to Halfords and pick up a boost gauge for under 20 bucks..

What are your PW's set too under cranking settings... have a play with these to get it to fire everytime at any temp, obviously if the battery is fooked or starter on the way out you should check those first!

What voltage are you getting in TS?

A tip someone told me is once you've got the car started, check your PW and Coolant temp and set the PW's under cranking to the same figure...

The pop you refer to I get all the time, just press the throttle before turning to ignition to release the pressure, or you could do the uprated spark mod if you fancy fiddling with the squirt again..

The MS experts will be along soon for sure.......
 

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The mighty skuzzle of destiny.. he rescued you!
how should it be plumbed in? mine openens with the throttle, which is wrong! lol I know its wrong, just dont know what it needs to be plumbed into, mr fast said to just plumb it into vac.... so I have. obviously my limited understanding was wrong!! its definately doing something, because its not slow and whining its head off!, but it aint as fast as it should be. I think I have a T piece ran to the map sensor, then annother T onto the bypass from this.

At least I'm mapped really well upto 90! lol ;-)

Pop wise, as long as it aint doing any damage, I'm happy, just tap throttle before starting?
 

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Plumb it into one of the outlets from the inlet. Use the other for your squirt.

Don't forget to plug the outlet on the actual bypass with something.

Does that make sense?

I could grab a pic if it helps...
 

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Plumb it into one of the outlets from the inlet. Use the other for your squirt.

Don't forget to plug the outlet on the actual bypass with something.

Does that make sense?

I could grab a pic if it helps...
thats what I have done, but I used one for all of them and split it, wrong I take it! Is this why the map sensor is reading low?

Is the other one (from the carbon cannister) ok to use?

My bypass opens with the throttle, and shuts with it., the split map tube from the inlet plugs into the black plus on the inlet. the other plug on the bypass has a doubled over hose on it to block it.

could it be a ms setting for the map sensor?
 

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Discussion Starter · #11 ·
I may be barking up the wrong tree here, but what map sensor does the MSpnp have? DIYAT says 44psi, which is 303kpa is it not?

Does this mean that my setting in megasquirt for "map type" in the basic constants box should be 300, because it is 400 at the moment....
 

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I may be barking up the wrong tree here, but what map sensor does the MSpnp have? DIYAT says 44psi, which is 303kpa is it not?

Does this mean that my setting in megasquirt for "map type" in the basic constants box should be 300, because it is 400 at the moment....
In TS, go to project properties...

Under settings -

Map sensor -

it should be - MPX4250 - 250kpa

At least thats what mine is....
 

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I may be barking up the wrong tree here, but what map sensor does the MSpnp have? DIYAT says 44psi, which is 303kpa is it not?

Does this mean that my setting in megasquirt for "map type" in the basic constants box should be 300, because it is 400 at the moment....
In TS, go to project properties...

Under settings -

Map sensor -

it should be - MPX4250 - 250kpa

At least thats what mine is....
[/quote]

It is now..... although it was 400 for some reason!! changed it, been for a drive, and map still get to exactly 90kpa and stops.... ??
 

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Where in the UK are you based? A trip to the old Skuz in Portsmouth is needed...

Wack a post up on miataturbo about the kpa issue, hopefully one of the pros on there will get stuck in...
 

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Discussion Starter · #15 ·
Where in the UK are you based? A trip to the old Skuz in Portsmouth is needed...

Wack a post up on miataturbo about the kpa issue, hopefully one of the pros on there will get stuck in...
I'll give it a go!

Unfortunately I'm a long way from portsmouth, in alsager, cheshire/staffordshire border!

I'll put a post over there, but its probably something really really daft! lol
 

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You should use a secondary device to confirm you are not getting any boost, that way you'll know it's the MS or not.
If you take it to Skuzzle I've got a spare mechanical boost gauge if he hasn't.
 

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Discussion Starter · #18 ·
You should use a secondary device to confirm you are not getting any boost, that way you'll know it's the MS or not.
If you take it to Skuzzle I've got a spare mechanical boost gauge if he hasn't.
the car is going pretty fast, and the sc is making a lot of noise for it to be getting no boost, so I doubt its that!

I might try and get hold of a boost guage anyway so I know what I'm getting, wheres best for a cheapy? do they just plumb into vac as well?
 

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Halfords as I said in a previous post, under 20 sheets..

Yes plumbs into the vac line.

In an answer to a previous question you can use the pipe that goes to the carbon canister, remove it totally while your in there.. there's a simple guide on here somewhere...
 

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Where in the UK are you based? A trip to the old Skuz in Portsmouth is needed...

Wack a post up on miataturbo about the kpa issue, hopefully one of the pros on there will get stuck in...
sent over mate, thanks very much

I'll nip halfords. Carbon cannister is gone, so I could use that one, some american mspnp instrucition website said not to use it for some reason so I tapped in to the same one for the map, and the bypass.
 
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