i got a good price on the new Platinum Sport 1000 setup with the plug and play for an s4 turbo II... now the car has a brand new from the dealer harness so plug and play shouldnt be an issue but is there anything else i will need to hook up or is it a true plug and play anything i should know as far as extra part needed to hook up to a laptop? im torn between this setup and a power fc... please help

 

The S4 TPS is not compatible with the Haltech. You will either need to splice in the Haltech TPS or use an S5 TPS and throttle body. I prefer the latter as it requires no fab work. IMO you should also splice in the Haltech air temp sensor in place of the factory sensor. The stock coolant sensor works well enough.

If you don't mind, what's a good price?

 

Hey Chris,

Actually, if you think about it a little, and i would actually encourage anybody to try it and report back, the stock S4 TPS could work, since it can actually function to about 20%, which is i believe the max operating point for the throttle pumps, it goes from 0-20% smoothly then it shoots to 100%.

The Haltech S4 PnP uses the stock TPS, so it might be worth exploring the possibility of leaving it in there, that way your OMP will stull function normally.

Let me know if you can give it a whirl.

 

omp is deleted already... but is there any additional hardware that i will need to purchase other then the ecu and plug and play adapter? ir the ecu comes with a port for the laptop to plug into??

 

just for reference the haltech unit im looking at is the Platinum Sport 1000

 

does the plug and play just plug into where the stock ECU would? I would suggest to just get a full harness, that way you can get rid of the 20-year-old harness and have a more reliable setup, and the wiring would be simpler too. platinum sport is an awesome unit, i was thinking of replacing my e6k with one. the software is killer

+1 on the S4 tps, it should work, although i have not tried it. I was just talking about this to some buddies last weekend. the tps is only used for decel fuel cut (0%) and closed loop on/off conditions. On my haltech TPS, i have the closed loop disable set for TPS > 27%, which is about where the stock S4 TPS maxes out, so it would work perfectly if you set it for 90% or so

 

While I agree that a flying lead kit is usually the way to go so that you can remove the suspect stock wiring, the original poster says he has a new stock harness so why not use it with the patch loom? Sounds reasonable and probably the best way to go for an admitted noob.

The biggest function of the TPS is throttle pump activation. While I have not tried using an S4 TPS with a Haltech I usually go by the rule of thumb that if it looks wrong then it is. There is potential for problems with the throttle pump around the area where the S4 TPS goes from approximately 20% instantly to 100%. Not only does the ECU need to see the throttle percentage but it also see how quickly the throttle transitions through it's movement and alters throttle pump output accordingly. If you happen to be holding 19% throttle and ease into the throttle to what would be 21% but the ECU sees 19, 20, 100% and thinks you just made a huge stab at the loud pedal when you haven't you could be dealing with a rich stumble.

That said, again, I haven't used the S4 and until someone reputable chimes in and says they have and it works flawlessly I will continue to recommend the S5 TPS and throttle body because we know it works correctly and it's an easy and inexpensive way to ensure that the system is properly setup.

To the original posters questions, you really need nothing else to run the engine other than the TPS. The stock air temp and coolant temp sensors can be used. The Platinum ECUs have built in 2.5 bar MAP sensors so if you intend to keep boost below 20 psi there is no need to purchase and external MAP sensor. The Platinum ECUs now have USB interface fr laptop programming and they ship with the USB cable. You really need nothing else.