Spider performance chip prevent DFP regen?

JonB2305 · 07-07-2015, 06:03 PM

I've been having problems with the DPF. On Sunday I changed the themostat, egr thermostat, glow plugs and glow plug controller which were all faulty. Earlier tonight I took the car for a 60 mile run along the M4 and the exhaust temp was spiking up to about 540 degC for short periods. The dpf fault codes kept reappearing so I was clearing them about every 10s and eventually one of them (481A) stopped coming up. I was trying to work out why it wouldn't regen properly so I parked up in the services and disconnected the Spider performance chip that I fitted a few months ago to see what would happen with the standard ECU map.

I turned around and drove the 60 miles home. Within about 10 mins the exhaust temp rose to 600-625 and stayed there for quite a while. Finally a successful regen!!

So now I'm wondering whether the reason I was getting mini spikes is because the dpf was so clogged that it couldn't get to full temperature, or is there something in the Spider chip code that's preventing it from regenerating properly? It could just be coincidence that it regen'ed when it did but I've left the chip disconnected for the time being. It gives the car a great power and torque boost but I don't want to be having dpf problems again in a few months time.

Has anyone had more experience with these or other similar performance chips? Would a remap affect the car's ability to regen the DPF?

Aragorn30d · 07-08-2015, 04:41 AM

It doesnt really surprise me, those tuning boxes are horrible bodges.

Essentially it fiddles around with fuel pressure without the ECU knowing whats going on to enable the car to inject more fuel. So its not really far fetched to determine that the ECU might get unhappy about the engine not doing what it expects.

A proper remap correctly modifies the ECU's internal programming, such that it knows exactly whats happening, and is a FAR better approach, and not only that will give a much better end result.

What were you using to monitor/log the exhaust temps etc?

JonB2305 · 07-08-2015, 12:45 PM

I used a C110 scanner stuck in an old phone holder to keep an eye on the temps and clear fault codes. It doesn't do any logging unfortunately.

07-07-2015, 06:03 PM	#1
JonB2305 New Member 0 Rep 5 Posts Drives: E90 325d Join Date: Jun 2015 Location: Bristol iTrader: (0)	Spider performance chip prevent DFP regen? I've been having problems with the DPF. On Sunday I changed the themostat, egr thermostat, glow plugs and glow plug controller which were all faulty. Earlier tonight I took the car for a 60 mile run along the M4 and the exhaust temp was spiking up to about 540 degC for short periods. The dpf fault codes kept reappearing so I was clearing them about every 10s and eventually one of them (481A) stopped coming up. I was trying to work out why it wouldn't regen properly so I parked up in the services and disconnected the Spider performance chip that I fitted a few months ago to see what would happen with the standard ECU map. I turned around and drove the 60 miles home. Within about 10 mins the exhaust temp rose to 600-625 and stayed there for quite a while. Finally a successful regen!! So now I'm wondering whether the reason I was getting mini spikes is because the dpf was so clogged that it couldn't get to full temperature, or is there something in the Spider chip code that's preventing it from regenerating properly? It could just be coincidence that it regen'ed when it did but I've left the chip disconnected for the time being. It gives the car a great power and torque boost but I don't want to be having dpf problems again in a few months time. Has anyone had more experience with these or other similar performance chips? Would a remap affect the car's ability to regen the DPF?
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07-08-2015, 04:41 AM	#2
Aragorn30d Lieutenant Colonel 175 Rep 1,596 Posts Drives: E90 330d Join Date: Mar 2015 Location: Fife iTrader: (0)	It doesnt really surprise me, those tuning boxes are horrible bodges. Essentially it fiddles around with fuel pressure without the ECU knowing whats going on to enable the car to inject more fuel. So its not really far fetched to determine that the ECU might get unhappy about the engine not doing what it expects. A proper remap correctly modifies the ECU's internal programming, such that it knows exactly whats happening, and is a FAR better approach, and not only that will give a much better end result. What were you using to monitor/log the exhaust temps etc?
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07-08-2015, 12:45 PM	#3
JonB2305 New Member 0 Rep 5 Posts Drives: E90 325d Join Date: Jun 2015 Location: Bristol iTrader: (0)	I used a C110 scanner stuck in an old phone holder to keep an eye on the temps and clear fault codes. It doesn't do any logging unfortunately.
	Appreciate 0 Quote