What does a det sensor do?

detect detonation!

smithy

As Smithy says!

 

Detonation (also called "spark knock") is an erratic form of combustion that can cause head gasket failure as well as other engine damage. Detonation occurs when excessive heat and pressure in the combustion chamber cause the air/fuel mixture to autoignite. This produces multiple flame fronts within the combustion chamber instead of a single flame kernel. When these multiple flames collide, they do so with explosive force that produces a sudden rise in cylinder pressure accompanied by a sharp metallic pinging or knocking noise. The hammer-like shock waves created by detonation subject the head gasket, piston, rings, spark plug and rod bearings to severe overloading.

 

 

Mild or occasional detonation can occur in almost any engine and usually causes no harm. But prolonged or heavy detonation can be very damaging. So if you hear knocking or pinging when accelerating or lugging your engine, you probably have a detonation problem.

Its basically there to protect your engine, if it detects det or the sensor is damaged/faulty then it will put the car into safety boost/limp mode to stop the problem happening until it is fixed, some people choose to bypass it but i personally think its stupid idea

detect detonation!

smithy

 

:rofl:

So if you hear knocking or pinging when accelerating or lugging your engine, you probably have a detonation problem.

 

He ain't got round to driving it yet, maybe 1 day soon........

smithy

Got to sort brakes out first cars been off the road for 4 years.and i dont get a lot of me time with two young children and a baby

As Smithy says!

 

Detonation (also called "spark knock") is an erratic form of combustion that can cause head gasket failure as well as other engine damage. Detonation occurs when excessive heat and pressure in the combustion chamber cause the air/fuel mixture to autoignite. This produces multiple flame fronts within the combustion chamber instead of a single flame kernel. When these multiple flames collide, they do so with explosive force that produces a sudden rise in cylinder pressure accompanied by a sharp metallic pinging or knocking noise. The hammer-like shock waves created by detonation subject the head gasket, piston, rings, spark plug and rod bearings to severe overloading.

 

 

Mild or occasional detonation can occur in almost any engine and usually causes no harm. But prolonged or heavy detonation can be very damaging. So if you hear knocking or pinging when accelerating or lugging your engine, you probably have a detonation problem.

So because ive fitted a rarther large fmic and a very large k@n air filter thats

messed up the air and fuel mixture resulting in my flat spot and the det sensor doing its job thus given me code 34. So im to leave well alone and wait until i can get the car set up again on a rolling road. Good job i have AP TUINING about two miles from were i live.:punk:

So because ive fitted a rarther large fmic and a very large k@n air filter thats

messed up the air and fuel mixture resulting in my flat spot and the det sensor doing its job thus given me code 34. So im to leave well alone and wait until i can get the car set up again on a rolling road. Good job i have AP TUINING about two miles from were i live.:punk:

 

Fitting a large FMIC and a new air filter won't mess up the air/fuel mixture. The engine will only draw in the air it requires and this is monitored by the MAF which adjusts the fueling accordingly.

 

See; you can type readable posts quite easily. :)

Ok then if the car has been put in safty mode because of the det senor then when in safty mode is the cars revs or timming chaneged electronically at all?

Ok then if the car has been put in safty mode because of the det senor then when in safty mode is the cars revs or timming chaneged electronically at all?

 

Yes. In safety mode the car runs on different fuel (rich) and timing (retarded) maps, significantly affecting performance.

So because ive fitted a rarther large fmic and a very large k@n air filter thats

messed up the air and fuel mixture resulting in my flat spot and the det sensor doing its job thus given me code 34. So im to leave well alone and wait until i can get the car set up again on a rolling road. Good job i have AP TUINING about two miles from were i live.:punk:

 

Code 34 does NOT mean the car is detting - it means the det sensor circuit is faulty so the ECU puts it into safety boost just in case it dets & it would not be able to detect it.

 

There are pros & cons to the det sensor being bypassed. If you have chipped the ECU & are running a boost controller then the det sensor is pointless anyway! It also only detects det up to a certain rpm so if you are flat out & it is detting then it will not do anything either.

 

If you are at all worried about det then you are far better off fitting a knock link with a visual display inside the car IMO.

Fitting a large FMIC and a new air filter won't mess up the air/fuel mixture. The engine will only draw in the air it requires and this is monitored by the MAF which adjusts the fueling accordingly.

 

See; you can type readable posts quite easily. :)

 

:nono: not needed Simon

Its an alarm fitted to all Zeds that keeps going off when you have spent to much money on it.Sort of like an OEM Conchance.

Code 34 does NOT mean the car is detting - it means the det sensor circuit is faulty so the ECU puts it into safety boost just in case it dets & it would not be able to detect it.

 

There are pros & cons to the det sensor being bypassed. If you have chipped the ECU & are running a boost controller then the det sensor is pointless anyway! It also only detects det up to a certain rpm so if you are flat out & it is detting then it will not do anything either.

 

If you are at all worried about det then you are far better off fitting a knock link with a visual display inside the car IMO.

 

Yes i have so bypass now comming and rolling road laters, thanks to all looks like problem solved after all.:clown: