Question about Volkswagen Passat
Electric pump filter systems are a pain. Just use two 55 gallon drumsto filter your oil with hand crank pumps. The first drum has a 10-20micron filter bag. Then hand crack the filtered oil into the seconddrum which has a “5 micron” bag. But make sure your install has an onboard filter/water separator.
So, your car will not start. This is probably thesecond most common problem discussed on TDI club, second only to glowplug problems. I will try to outline some of the problems that peoplehave had, provide links to what has been done and add some pictures andlinks to guide you along to get your car started.
If you have a "No Start Condition" (NSC) you need to differentiate between some different fault situations.
The Intermittent Problem: It may be any one of the above, but it onlydoes it intermittently. For this, you still need to look at theappropriate fault situation. The good part is that this will mostlikely be an electrical problem. The bad news is that problem is"somewhere" on the car and will require some detective work to find thesource.
The Mixed Bag: Maybe you find that you have a little bit of this andlittle bit of that: If that is the case, do the troubleshooting forboth.
Don’t crank the engine over for more than 30 seconds at a time, thenallow at least two minutes of cool down before you crank again. This isto protect the starter from overheating, exacerbating your situationsuch as in this post
If you have any tuning boxes on your car, remove them and see what happens. Your box may be causing a problem.
Glow plugs only help the engine start, they are not required until thetemperature gets very cold. (Very cold is described as when you breathand your nose hairs freeze)
Finally, if you are having electrical problems check the fuses firstthen check the grounds on the car. Even if things don't seem related,make sure all of the fuses are good.
A few definitions as they relate to starting the car.
I'm going to put each of these in a different post, so if people haveadditional information, quote the pertinent post and I'll try to addyour information in that post, or at least link it there.
First, here is a post with much of the basics of the diesel engine.
For the TDI to start, electrical power needs to flow from the batterythrough fuses and relays to the key switch and ECU. From the keyswitch, power needs to flow through more fuses and relays to the startsolenoid on the starter and from the ECU power needs to flow to theinjection pump.
For the TDI engine to run, it needs three things: Sufficient air, sufficient fuel injected at the
correct time and sufficient heat generated by compressing the air.
HERE IS A LINKto the TDI FAQs about no starting. Much of it is the same as what isfound here but here you have pictures with circles and arrows and aparagraph explaining what each one is about.
HERE IS A LINK to the basic starting system for >2000 J/G/B. HERE is the list with reference numbers for what stuff is and where most of it's located. Stay tuned for updates.
Thanks to Fred
Without Fred and this forum none of thisinformation sharing would be possible. If this thread was helpful andyou saved mega bucks fixing or diagnosing the problem yourself, pleaseconsider a donation (see paypal button on home page) to ensure thatthis site remains available in the future.
Thanks to all of TDI Club
Without the members of TDI this thread would not exist. The only thingI have done here is assemble the collective information of others. Theyare the heros for putting the information out there for everyone. __________________
How to troubleshoot a car that won't start.
Troubleshooting low power and limp mode by Canadian Grizzly.
Posted on May 22, 2009
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Posted on Jan 02, 2017
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