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Wiring Masters Needed B3 90q with AAN swap
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Paul Nugent
Webmaster http://S2central.net
Administrator http://S2forum.com
1994 S2 Coupe ABY - aka Project Lazarus
2001 A6 allroad 2.5TDi - family tank
2003 S4 Avant 4.2 V8 - daily burble
Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)
There are only 10 kinds of people that understand binary - those that do, and those that don't
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Originally posted by Durr McDanks View Posthmmm it didnt fire and I am pretty sure its timed properly too... maybe I fouled the spark plugsRS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Yeah they were pretty dry. What is wrong with the wiring still? The LED light test worked. I am not getting spark for some reason either but I am getting switched power at pin 27.
FYI: its not the POS sensors because I have the high output kit from 034Last edited by Durr McDanks; 28 January 2011, 04:00.
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Originally posted by Durr McDanks View PostYeah they were pretty dry. What is wrong with the wiring still? The LED light test worked. I am not getting spark for some reason either but I am getting switched power at pin 27.
FYI: its not the POS sensors because I have the high output kit from 034
1. that you have power to the coils with the ignition turned to "on", white harness connectors in an AAN. You need a multi-meter set to DC Volts to do this.
2. that you have spark during cranking (starter activated). This DIY should help:
http://forums.quattroworld.com/s4s6/msgs/22611.phtml
If you have spark, button things up and move to (3)
3. that you have fuel at the fuel rail while the starter is engaged. Probably easiest to pull the injectors and fuel rail out of intake manifold as a unit, placing a glass jar under each of the five injectors and having somebody turn the ignition to start and see if anything comes out. I suspect not.RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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check and make sure it is getting 12v feed at the ECU while cranking, had this while putting the engine in my A4.
Simple fix if it is, power gets cut from main power sources under cranking, i.e fans, radio, lights etc
Sean.1993 URS4 Avant Emerald Green 350+bhp
1991 Ford Sierra Sapphire 4x4 in Magenta
BoooOOOSSSSSTTTT BANG BANG CHIRP CHIRP
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Originally posted by Durr McDanks View PostAt the ECU its still 11.3V so I went to the battery and the battery is at 11.3v. I have charged the battery for a while and its a relatively new battery and its still stuck at 11.3V. But the main question I have is is it necessary to have 12V or will a 11.3 suffice?Last edited by UrS4boy; 29 January 2011, 05:01.RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Originally posted by Durr McDanks View PostThere is no spark but 11.3 volts is registering at each pin in the white connectors.RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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Originally posted by UrS4boy View PostIf you have voltage (11.3V in this case) at the white connectors, but there is no spark while you turn the key and engage the starter, then there must be an issue with the ECU *OR* the way you have the 034 HO coil packs wired to the ECU.
Durr, do you have these grounds in place? No grounds, no spark (the internal POSs are really switches that the ECU controls and sends power FROM the coils, through the POS (internal to the coil packs in this case) to ground in order to create the spark at the right time and for the correct length (dwell). No grounds, no spark.
Last edited by UrS4boy; 30 January 2011, 17:01.RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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That's a good point. The factory loom has a big earth strap from coils to the head.
Would be good to know if the ECU is immo type or not as well.Paul Nugent
Webmaster http://S2central.net
Administrator http://S2forum.com
1994 S2 Coupe ABY - aka Project Lazarus
2001 A6 allroad 2.5TDi - family tank
2003 S4 Avant 4.2 V8 - daily burble
Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)
There are only 10 kinds of people that understand binary - those that do, and those that don't
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Originally posted by Durr McDanks View PostOn the 034 harness there are two grounds(or what I assume are grounds) of which both are attached to the back corner of the cam cover. Where should I send my ECU to to make sure everything is working properly?
A good way to check if it is working is to find somebody local to you with an UrS4 or S6 and ask them if you can swap your ECU into their car to verify that it works. There is Steve Eiche in Arvada Colorado who can check your ECU if it doesn't work. (Common problem is water-damaged ECUs from failure to clean the UrS4/S6 plenum drain).RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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