15 replies to this topic

[Shamone]

Hi, sorry to resurect this one, but now I'm using the car more frequently I've found the P1171 error occurs about once every 20-30 miles when the engine is fully warm. The freeze frame data I keep downloading shows that that it has always occured when the engine is at operating temperature - something I missed before (Courtney previously thought it was the open loop warm up cycle). What's odd is that I've just done a Car Limits day and it happened about 8 times on the drive there - no times during the event - and about 3 times on the way home. The freeze frame data shows a similar MAP pressure and engine revs so it looks like it's when cruising that it occurs and not when giving the car some stick. On the way home I had a couple of random missfires while cruising under a slight throttle and also got a new error code P1514. I've now got a Scangauge II but am finding it a real pain that the fan keeps coming on and I keep have to reset the stored error. It's not enough to put the EML light on, so I only know the fan is on when in traffic/junctions etc. (I'm conscious that the fan will burn out). Has anyone with an SC Z22SE had similar issues?

[techieboy]

I had the P1514 before I went SC. It happened constantly at "cruise" at about 3,800rpm and the only way we managed to get rid of it was by dumping the 68mm LSJ throttle body I was using with the 2.4 inlet manifold (since re-used as part of the stage2 SC conversion). It seemed to be as a result of out of expected range MAP readings and no matter how we tried to dampen those readings, we never got to the bottom of it.

Might be worth checking to see whether your MAP sensor is properly seated on the supercharger body but can't help with the other error, I'm afraid.

[PaulCP]

Give Jon at Courtenays a call. There's a fix for the fans (P1171 code) which he did on mine last week. Involves putting in a thermostatic switch rather than them being controlled by the ECU which also means they can be programmed to come in sooner than the 106 degrees.

Edited by PaulCP, 19 June 2009 - 06:54 PM.

[Mike (Cliffie)]

Give Jon at Courtenays a call.

There's a fix for the fans (P1171 code) which he did on mine last week. Involves putting in a thermostatic switch rather than them being controlled by the ECU which also means they can be programmed to come in sooner than the 106 degrees.

Fans...fans...don't you mean fan?

I only have one fitted.

[Winstar]

Give Jon at Courtenays a call.

There's a fix for the fans (P1171 code) which he did on mine last week. Involves putting in a thermostatic switch rather than them being controlled by the ECU which also means they can be programmed to come in sooner than the 106 degrees.

Fans...fans...don't you mean fan?

I only have one fitted.

the proally charge cooler system fits two fans

[MartinS]

How easy is the thermostatic switch, my car gets hot quite quickly and am thinking of fitting a cool running thermostat as a simple solution. I am also going to add some water wetter to the system. Good ideas? Martin s

[VIX]

How easy is the thermostatic switch, my car gets hot quite quickly and am thinking of fitting a cool running thermostat as a simple solution. I am also going to add some water wetter to the system. Good ideas?

Martin s

I have the cool running thermostat - not sure if I have the water wetter too. My car generally runs cooler, around the 79-84 degree mark, but still shoots up to 100+ when stuck in traffic. I've just got a ScanGauge so I can turn the fan on. The thermostatic swich (or even a manual one) is probably a much cheaper solution although the ScanGauge can do other stuff like clearing codes.

[PaulCP]

Give Jon at Courtenays a call.

There's a fix for the fans (P1171 code) which he did on mine last week. Involves putting in a thermostatic switch rather than them being controlled by the ECU which also means they can be programmed to come in sooner than the 106 degrees.

Fans...fans...don't you mean fan?

I only have one fitted.

the proally charge cooler system fits two fans

[PaulCP]

How easy is the thermostatic switch, my car gets hot quite quickly and am thinking of fitting a cool running thermostat as a simple solution. I am also going to add some water wetter to the system. Good ideas?

Martin s

I have the cool running thermostat - not sure if I have the water wetter too. My car generally runs cooler, around the 79-84 degree mark, but still shoots up to 100+ when stuck in traffic. I've just got a ScanGauge so I can turn the fan on. The thermostatic swich (or even a manual one) is probably a much cheaper solution although the ScanGauge can do other stuff like clearing codes.

Not a bad idea Steve. I have a code reader which can pick up running data but don't think it is as sophisticated as the scangauge.

Interestingly enough Jon explained that the fact that the ECU switched the fan(s) on at 106 degrees was a bit of a cock up by Vauxhall. (some of us always thought it was a bit late). I think the point was that they used the Astra G setup which does have 2 fans, one which the ECU switches on at 98 degrees (ish) with the 2nd coming on at 106 degrees. Since the VX in original spec only has 1 fan the ECU control mapping picks up the latter temp to switch the fan on.

Not had chance to rest mine out yet but hopefully will do so this weekend but for track work the fans coming on earlier will be no bad thing

Edited by PaulCP, 20 June 2009 - 10:40 AM.

[Shamone]

I wonder how close Courtney are to full access to the ECU? It sounds like they could solve a lot of issues and set up the cars better than Vauxhall did

[Muncher]

Bit of a resurrection here, but I detected a P1171 yesterday. Now I've had the fans coming in before, but I can't recall actually seeing that light come on? As my header tank cap failed and spilled coolant everywhere I guess it's possible that one of the fuel pump relays got a bit wet but I can't be sure of the cause of it. The car has also been a bit stuttery at low revs and part throttle especially when cold so it wouldn't surprise me if it was a lean issue due to the mapping.

[Shamone]

Courtney actually got to the bottom of this and revised the map last year. I've never had it since Did you get the new map?

[tommobot]

Bump...

 

Getting P1171 every now and then when warm, but no dash light, only fault via scangauge and fan on...

 

Is there any clear fault here? Can't really see much info above.. 

[FLD]

Could be tired fuel pump, I had it till I swapped my pump.  The map also has a flat spot around 2250rpm which may also cause it (I believe later maps have solved this)

[smiley]

1171 historicly reported on:

 

- Fuel pump power low or fuel hose pressure leak. - Crack in exhaust manifold. - Injector plug not connected well - Alternator defect.

 

Take your pick

[tommobot]

Cheers guys

 

Since posting this, and thinking about it some more, I had a cracked manifold when I got this code before, so I guess that feasable again... Will take a close look at weekend. Car has ticked over 80,000 so fuel pump feasible aswell.

 

Did a mammoth run in it last weekend and think the code popped up three times, but hasn't re-occured since..