it's done, glens turbo results

[Sean]

oh ok... I thought he may have had it firing sequentially and the petrol getting in on the wrong stroke of the crank/cam...

ie: cyl1 compression but cyl 4 has had the injector squirt fuel on the wasted rev so cyl 1 spark will be igniting an empty chamber and cyl 4 spark firing a mixtire not compressed properly because of the valve overlap.

Did i explain that properly

Oh well something like that

Ah Yes, I get you now.

Silly me was looking at crank but not cam damn my lack of sleep

So it is possibly that the injectors are wired as 1234 instead of 4321, but I still am dubious as to if it's even run at all on that....

Glen - Do you have it wired as injector #1 being the one closest to the radiator or firewall? It should be the one at thr front of the engine closest to the radiator.

[glen73]

oh ok... I thought he may have had it firing sequentially and the petrol getting in on the wrong stroke of the crank/cam...

ie: cyl1 compression but cyl 4 has had the injector squirt fuel on the wasted rev so cyl 1 spark will be igniting an empty chamber and cyl 4 spark firing a mixtire not compressed properly because of the valve overlap.

Did i explain that properly

Oh well something like that

Ah Yes, I get you now.

Silly me was looking at crank but not cam damn my lack of sleep

So it is possibly that the injectors are wired as 1234 instead of 4321, but I still am dubious as to if it's even run at all on that....

Glen - Do you have it wired as injector #1 being the one closest to the radiator or firewall? It should be the one at thr front of the engine closest to the radiator.

i have #1 being closest to radiator, but yer i mean it still take ages/if your lucky to start. i think it's more than a bad tune atm. imagine the worst motor you have ever heard run and times it by ten.


im getting some alloy pipe tomorrow for da BOV.

so it's not far away.

i had the motor going right before i dropped the ecu in which wasnt that long ago. i even changed injectors again just to rule them out. spark plugs dont look real bad either.

should i change the order of injectors to see what happens cause somthing aint right somwhere

[Sean]

No if you have 1 at the front I really think it's a tuning issue.

Remeber the ECU probably has no or very little tuning for cold start etc.

When I get some more time, I'll get some basic maps together for you.

Won't be before teh weekend though.

[ampz]

I agree, ecu's with little tune really freak out when you fire them up initially.

I had a problem with a gemini i helped tune where the guy who wired it put the crank angle sensor (off the dizzy) 180 degrees out

The engine ran but because of the valve overlap, it made a few tractors jealous

I hope i wasn't too misleading and wasted too much of your time.

EDIT: I wish i could help but I don't have an mx5 (yet) to play with

[glen73]

No if you have 1 at the front I really think it's a tuning issue.

Remeber the ECU probably has no or very little tuning for cold start etc.

When I get some more time, I'll get some basic maps together for you.

Won't be before teh weekend though.

ok, im happy for it to go to the tuners as is then. but it wont probably be till after the weekend now.

sean only if you can be bothered but if it goes to the tuners before then i will let ya know so your not wasting ya time

i will see what happens, if i can get her idling that would be nice

[Sean]

No worries man, there is very little chance the cold start or idle are close enough to get it to idle when cold.

Be sure to ask the tuner to check your base timing and TPS calibration to ensure teh idle can be tuned nice and smooth.

[glen73]

No worries man, there is very little chance the cold start or idle are close enough to get it to idle when cold.

Be sure to ask the tuner to check your base timing and TPS calibration to ensure teh idle can be tuned nice and smooth.

it barely revs. i wish i had a sound recording device so you can hear my sic puppy it sounds as if there should be some tests done on it to see how it is even running

[glen73]

ok, sean i did as you said and ran it flat out for 30 sec, it seems to run better now but still extremley hard to start. i dont think the people next door are liking me much either with the amount of smoke it blows. i had to take a break so i didnt poison myself. but the best thing i heard was when i turned her off i could hear somthing whistling down....i wonder what that could be

will this get lower the fuel ratio

It may have fouled plugs. Go to the Options screen and MIXTrim do -20% and see how it runs after you have a clean set of plugs in. Check spark on all cyls too.
Regards, Tim.


thats tim off da mtech forum.
fouled plugs......does this mean there nackered cos they cost me heaps. iridium plugs arent cheap.

[glen73]

ok heres the inside of the car, i took the stereo out and will be located to the gloves box. i made this panel up through my own laziness so i didnt have to find da ign wire and fuel pump wires. these 2 switches will control both.





heres a pic of under the bonnet, it's 99% done except for the BOV hose.




nervous times ahead, im going to the tuners on thursday. im a little worried about the stock clutch as to when it's going to start to slip.

[glen73]

up at 5am thursday morning, car on trailer and ready to go. after 1.5 hours of driving im looking to be a little late, i ring forward to tell maztech im running late. they turn around and tell me anthony (tuner) has gone to sydney and wont be back till tomorrow. this makes me happy but what can you do! costs me a days $ work.

they said they will start it friday.
i get there and they recomend a new pump, so theres an extra $400

now it's friday

just got a phone call off them, they tell me its missing. no sh!t. i told them this before i even took it up. now they think all the wiring is wrong and i will be up for another $2-300 on top to get it re-wired + fuel pump($400)+ tune($400). they have me by the balls.
all this makes me very happy.
oh and they aint touching it till monday.
so yippy f#cking yay

[jules]

Are these guys trustworty???
This sounds like a load of BS (stands for Bloody Expensive Tune).


Jules

[glen73]

Are these guys trustworty???
This sounds like a load of BS (stands for Bloody Expensive Tune).


Jules

well i was told that if you just let them tune then anthony is very very good, but if you let them do repairs or work on teh motor then they will rip you off. the problem is my car is over 2 hours away from me. this is the reason i wanted it to idle before i sent it up.

Tim from the microtech forum even said to take it up once it runs....even if it's just 2 cylinders. he also said they should rectify the problem within 1 hour. not 2 days and $300 later. they have already cost me a days wage being a contractor so when you add those 2 alone together theres an extra $600.

i feel really angry and feel like im being taken for a ride by these guys.
they said the water temp jumped from 1 extreme to the other when the ign is on or off, asked whether the injectors were flow tested. i was honest and said no but added that it ran the exact same way with the stock injectors. like a bag of sh!t.
they also added the injectors could be wired in the wrong order, alls i can do is stay pissed off for the weekend and wait to see what stupid bill they are going to come up with.

[The Pupat]

But the throws on cyl 1+4 and 2+3 are the same anyway....

So even if teh injectors were wired 1234 instead of 4321 that shouldn't matter.

I suspect it's a combo deal of fouled plugs (from not starting but having fuel pumped in), an engine that's been sitting unstarted for a while, and a poor basic tune.

Just to add some useless (useful?) information. We actually got an SR20DET to run on waste spark with it firing 2-4-2-4 (2cylinders-4cylinders). Ran like a bucket, took forever to get to ignite, but it ran.

From what I've learn with these things (which isn't a huge amount) problem solving ECU is hard enough when you standing in front of the car is hard enough.

Anyway I reckon you're best just leaving it with Maztech and letting them solve it. I reckon Aftermarket ECU installations should be left to professionals unless you have a very good grasp on electronics. Unfortunately I'd say you've learnt the hard way. Hope they can sort out the problem quickly.

[glen73]

so if it was firing in wasted spark how can this be resolved? at the moment they are waiting on a auto elec to turn up as they are quite sure it's a wiring fault.
i dont know but when you said about the way the sr20det ran on wasted spark that was my motor to a tee, took ages to start and then ran like a sh!t box.

[ampz]

Wasted spark fires two cylinders at once, eg: 1 + 3, then 2 + 4, but since only one of those cylinders is acutally on the compression (firing) stroke with fuel in the cylinder, the other is referred to as the wasted spark.

As I posted earlier, if you had the wrong injector firing at the wrong time of the stroke (ie: filling the wasted spark cylinder) then the motor would be running out of phase and rough...

As I haven't played with mircotechs since the mid 90's, I am unsure if the
Microtech can do a systems check whereby it fires one output at a time, i know it can fire them all at once, but to track down your sequence of events (eg: injector 1 then coil 1, injector 2 coil 2, injector 3 coil 1, injector 4 coil 2) could get quite difficult.

Unfortunately, remote diagnosing ecu's which are unfamiliar involves a lot of guess work, not to mention some calculated risks.

It is a shame you are not closer, i would have been more than happy to have a fiddle to help out. Engine management is not rocket science, but it isn't exactly cake either.