<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body><div><div style="font-family: Calibri,sans-serif; font-size: 11pt;">Why would he only see a small spark? Doesn't that suggest a ignition problem?<br><br>Dave.<br>UK VW Type 3 and 4 Club.</div></div><div dir="ltr"><hr><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">From: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:jadney@vwtype3.org">Jim Adney</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Sent: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">09/06/2018 15:33</span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">To: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;"><a href="mailto:type3@vwtype3.org">type3@vwtype3.org</a></span><br><span style="font-family: Calibri,sans-serif; font-size: 11pt; font-weight: bold;">Subject: </span><span style="font-family: Calibri,sans-serif; font-size: 11pt;">Re: [T3] B brain</span><br><br></div>On 8 Jun 2018 at 10:29, Mark Reno wrote:<br><br>> I have done the trouble shooting that is in the book. And have pulled the<br>> injectors and have watched them spray. I replaced the pump when I got the<br>> car because it wasnTMt working. I have also already done the tune up<br>> stuff and checked my timing multiple times. And when I have held the plug<br>> wires to a ground I get a dim spark. I also tried a different regular. I<br>> could have over charged the system to. The book says that could ruin the<br>> system.<br><br>If the pump runs for ~1 second after you turn the key ON, you know the <br>power and ground for the brain is all good and that the portion of the brain <br>that monitors the engine rpm and controls the pump is all good. This also <br>tells you that the FI wiring to the starter solenoid is correct.<br><br>If the pump comes on and stays on, after turning the key ON, the FI wire to <br>the solenoid is on the wrong terminal. If so, disconnect that wire and leave it <br>where it can't touch anything, other than possibly a ground.<br><br>If you can see the injectors pulse gas while cranking the engine, you've <br>verified that the injection control portion of the brain is working. That leaves <br>the brain as confirmed good. The problem is elsewhere.<br><br>The fact that you see fuel injection squirts also verifies that the trigger points <br>are working properly.<br><br>If you've checked the dwell and timing and it's always been good, then the <br>distributor is correctly seated and the injection pulses are timed right.<br><br>Other things to check:<br><br>Verify that the hose between the IAD and the pressure sensor is connected <br>at BOTH ends.<br><br>Loosen and then tighten the ground screws for the injector ground wires on <br>each head.<br><br>Verify that the plastic parts that hold the injectors are intact, so that each <br>injector is held firmly against its port in the intake manifold. There should be <br>no play between the injector and the intake manifold. <br><br>Pull the spark plugs and make sure they are in decent condition, not sooted <br>up.<br><br>One other thing I can think of is that sometimes the FI will flood the engine <br>and this can be hard to get around. To fix this, make sure the battery is well <br>charged, then, with your left hand, reach under the dash and find the white <br>connector on the face of the fuel pump relay. Pull that connector off JUST <br>FAR ENOUGH that you can push it back on quickly and easily. I pull it back <br>and then tilt it just enough that one prong is still connected, which keeps the <br>connector aligned just enough that it can be pushed back on. Practice this <br>move. Then pull the plug back and turn the key to START and try to start the <br>engine. Use the gas pedal to give it more air, but don't pump the pedal.<br><br>Crank for some time. If it was flooded, it may start to fire and eventually sort <br>of run. Keep cranking until it JUST shows signs of starting to run less well, <br>then plug the fuel pump plug back in. Use the pedal to keep it running. You <br>may have to repeat this. Your timing with the plug is critical. If you plug it <br>back in too soon, it may flood again. If you're too slow, it won't start and you <br>may have run the battery down too far.<br><br>Try not to run the starter more than 1 minute at a time. Let it cool down <br>between tries.<br><br>If this is your problem, I have a $30 switch kit that will let you easily turn the <br>pump on or off to get around this problem.<br><br>Report back with what you've found. Let us know your location.<br><br>-- <br>*******************************<br>Jim Adney, jadney@vwtype3.org<br>Madison, Wisconsin, USA<br>*******************************<br><br>_______________________________________________<br>VWType3.Org mailing list - type3@vwtype3.org<br>To unsubscribe or change subscription options, visit:<br>http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org<br>If you need more help, contact: gregm@vwtype3.org<br></body></html>