Mi16 Problem!

[Craig.Mi16 5 1 Cars]

Yesterday i cleaned up all my earth points, gave the throttle body clean out and replaced the pipe that runs from the oil filler cap to the throttle body.

 

good point, seems to idle better....for a while, then the revs slowly climb to around 1500rpm

soooo, i took it out for a run but after been rev'd it seems to stick at about 3000rpm or wherever you rev the engine to until you blip the throttle.

 

not exactly sure where to go from here, ive read a few post mensioning throttle sensor and icv but couldnt seem to locate the icv anywere.

 

any help would be awsome, cheers.

[ORB 227 1 Cars]

It's on top of the inlet. Cylinder shaped thingie with pipe going to it and a multi plug.

[Craig.Mi16 5 1 Cars]

hmm didnt see that, im wondering if theres even one on there. ill have a thourough look when i get in later most likley ive just over looked it like a div.

 

cheers mate.

[kyepan 291]

weak throttle return spring, or sticky throttle will cause that too, as would any small air leaks down stream of the throttle butterfly.

Spray easy start on each bit of pipe and union in turn, until you find where the leak is.

[Ryan 99]

[Craig.Mi16 5 1 Cars]

weak throttle return spring, or sticky throttle will cause that too, as would any small air leaks down stream of the throttle butterfly.

Spray easy start on each bit of pipe and union in turn, until you find where the leak is.

weak throttle return spring, or sticky throttle will cause that too, as would any small air leaks down stream of the throttle butterfly.

Spray easy start on each bit of pipe and union in turn, until you find where the leak is.

ill have a look and use a bit of easy start thanks mate.

[Craig.Mi16 5 1 Cars]

ICV.JPG

yep...definatly no icv on my car, that will explain my cold start troubles i guess, no idea why the previous owner or whoever fitted the engine would take it off.

[Ryan 99]

Is it running on the 16V ECU, or was it done the crap way with the 8V ECU and dizzy adaptor?

[Craig.Mi16 5 1 Cars]

jeez i honestly have no idea, how can i tell? i checked out the ecu the other day and it says on it that "warning this ecu has no rev limiter" if that makes any sense.

[ORB 227 1 Cars]

That's common. Take a picture of it and post it up!

 

Do you have a big alloy (cylindrical) block between the head and the distributor cap?

[S@m 156]

Sounds like 8v management if its got a de-limited ecu - but the dizzy adaptor ORB mentions above would confirm it.

[Alan_M 66 1 Cars]

Have you checked for play on throttle body shafts? If worn, can be a forgotten source of unmetered air.

[Craig.Mi16 5 1 Cars]

That's common. Take a picture of it and post it up!

Do you have a big alloy (cylindrical) block between the head and the distributor cap?

Sounds like 8v management if its got a de-limited ecu - but the dizzy adaptor ORB mentions above would confirm it.

yes there is, must be 8v managment then. so does this mean i dont need an icv? ill get a pic posted up if its light enough when i get home.

 

whats the differnce then with 8v and 16v managment is there any difference in perfomance, it would seem to make sense to me for 16v managment to be on a 16v engine surly?

[Craig.Mi16 5 1 Cars]

Have you checked for play on throttle body shafts? If worn, can be a forgotten source of unmetered air.

When i had it off yesterday it looked fine tbh although the top one seem to open slightly before the bottom one, i assumed this was normal after checking out the mechanism on the side.

[Craig.Mi16 5 1 Cars]

ok so ive checked the throttle body and that looks spot on and not worn, also gathered that im running 8v managment.

 

so im going to buy a replacement throttle sensor, is there anything else that could be making it rev so high?

 

also is it worth me changing to the 16v ecu and loom? if so what will i need and cost?

 

appreciate your help guys. cheers.

[Miles 331 1 Cars]

Yes swap to a 16v loom & you'll notice a huge difference,

The SAD controls the cold start but if stuck open could cause this, Just crush/Bend the SAD hose with your fingers to check, Cost for a complete 16v set up in good condition I'd say now is from £200.00 as they are rare, Worn out ones will be cheaper

[Craig.Mi16 5 1 Cars]

Yes swap to a 16v loom & you'll notice a huge difference,

The SAD controls the cold start but if stuck open could cause this, Just crush/Bend the SAD hose with your fingers to check, Cost for a complete 16v set up in good condition I'd say now is from £200.00 as they are rare, Worn out ones will be cheaper

awsome stuff, il have to get my hands the 16v set up then...does this consist of just the loom and the ecu?

 

i was wondering because of the dizzy adapter they only have them on the 8v managment dont they? what would replace this.

 

ill have a look for the SAD when i get home.

 

cheers.

Edited March 8, 2013 by Craig.Mi16

[Craig.Mi16 5 1 Cars]

had a look for the SAD valve and cant seem to locate it, any chance it might not have one on or would it be running like crap?

[Alan_M 66 1 Cars]

awsome stuff, il have to get my hands the 16v set up then...does this consist of just the loom and the ecu?

 

i was wondering because of the dizzy adapter they only have them on the 8v managment dont they? what would replace this.

 

ill have a look for the SAD when i get home.

 

cheers.

 

Mi16 setup consists of dizzy cap, TPS, AFM, Crank Sensor, ECU, Relays, ICV (Idle Control Valve) and amp/coil (I can't remember if you can get away with 8v ones though, don't think the 8v coil will mount to the Mi inlet).

[Simes 248 2 Cars]

Or spend around 1k and run it on a Gti-6 inlet, 3rd party ECU and get it mapped.

It will eliminate the need for any of those mi16 bits you need of which the ones with moving parts will be worn.

[Alan_M 66 1 Cars]

 

It will eliminate the need for any of those mi16 bits you need of which the ones with moving parts will be worn.

 

True, Mi16 AFMs are going the same way as the throttle body's. Good ones are getting scarce.

[Craig.Mi16 5 1 Cars]

 

Mi16 setup consists of dizzy cap, TPS, AFM, Crank Sensor, ECU, Relays, ICV (Idle Control Valve) and amp/coil (I can't remember if you can get away with 8v ones though, don't think the 8v coil will mount to the Mi inlet).

Or spend around 1k and run it on a Gti-6 inlet, 3rd party ECU and get it mapped.

It will eliminate the need for any of those mi16 bits you need of which the ones with moving parts will be worn.

 

 

True, Mi16 AFMs are going the same way as the throttle body's. Good ones are getting scarce.

hmm decisions, i dont really have a spare grand though, tbh id like to get my engine running spot on first, ive got a new tps on the way to see if that sort out my high rev problem ive aquired since cleaning up the earths and throttle body.

 

so with the 16v setup you would need the loom aswel right? this is most likly the route ill as im limited to cash then hopefully some better cams.

 

would be handy to know if i could use any of the 8v setup, ill do a bit of googling. ; )

 

appreciate the help. cheers

[Miles 331 1 Cars]

Nothing bar the Ign amp, TPS & Water temp sender can be used from the 8v set up

[Craig.Mi16 5 1 Cars]

alright smooth cheers mate, how hard is it to wire up the 16v loom is it fairly straight forward?

[Simes 248 2 Cars]

If you're going to get cams a 3rd party ECU will get more out of them.

I ran different cams for years on std mgmt.

Moving from mi16 inlet to a wasted spark set up on a Gti-6 inlet gained me 10bhp!