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> Cylinders 3 and 4 are dead, why?
Skid
post May 8 2010, 06:27 PM
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I just brought home a 73 1.7. This is the first 914 that I have actually owned, but not the first one that I have driven. My dad has always had a few 914's around and I finally decided it was time to get one of my own. When I first picked up the car, it ran pretty good and smooth. The original fuel injection has been removed and replaced with some duel single barrel weber carburetors and it has a 009 distributor. Like I said, the car ran pretty good when I first got it about 2 weeks ago. For the past 2 weeks I haven't driven the car more than just around the block, and suddenly, out of the blue, I went to go move the car and it is running bad. It has a definite misfire and, when I pull the plug wires off the distributor cap, 3 and 4 seem not to be firing. I have checked compression in those two cylinders and they are fine. I am getting fuel (I can see that the carb is squirting gas), and I have also tested to see that I was getting spark on those two cylinders. If I have spark, fuel, and compression, what am I missing? How could it just change overnight? I am pretty stumped here, my dad, who has worked on these things for over 20 years is also pretty stumped. Any ideas or help would be very appreciated.

(IMG:http://www.914world.com/bbs2/uploads_offsite/lh5.ggpht.com-3538-1273364830.1.JPG)

(IMG:http://www.914world.com/bbs2/uploads_offsite/lh4.ggpht.com-3538-1273364831.2.JPG)

And the mess of an engine bay..... (IMG:style_emoticons/default/barf.gif)
(IMG:http://www.914world.com/bbs2/uploads_offsite/lh6.ggpht.com-3538-1273364831.3.JPG)

Thanks,
Chase Birks
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JamesM
post May 10 2010, 01:07 AM
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Hurry up and get that thing running, you have a PCA autocross to get to this sunday! We need more 914s there.

Let me know if you need a hand... or parts. My house is starting to look like a 914 wrecking yard. (IMG:style_emoticons/default/smile.gif)



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Skid
post May 10 2010, 10:53 AM
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Ok! I figured it out! Boy do I feel stupid. I worked on the car for hours on saturday. I changed plug wires, plugs, rebuilt the carb, adjusted the timing, and a few other things, and nothing helped one bit. I was playing with the timing when the car backfired and my dad noticed that flame came out from the manifold on the dead side. He reached down and stuck his finger over the hole, which was just out of view, and just like that, the car sprang back to life and ran just like before. I guess some little plug that had been there before must have fallen out and caused a vacuum leak. So for those of you who guessed vacuum leak, you win the prize! Thanks for your help and info. I am sure I will be needing lots more of it as I get this little guy back on the road. Next step, emission and inspection, wish me luck.
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70_914
post May 10 2010, 11:38 AM
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QUOTE(Skid @ May 10 2010, 09:53 AM) *

Ok! I figured it out! Boy do I feel stupid. I worked on the car for hours on saturday. I changed plug wires, plugs, rebuilt the carb, adjusted the timing, and a few other things, and nothing helped one bit. I was playing with the timing when the car backfired and my dad noticed that flame came out from the manifold on the dead side. He reached down and stuck his finger over the hole, which was just out of view, and just like that, the car sprang back to life and ran just like before. I guess some little plug that had been there before must have fallen out and caused a vacuum leak. So for those of you who guessed vacuum leak, you win the prize! Thanks for your help and info. I am sure I will be needing lots more of it as I get this little guy back on the road. Next step, emission and inspection, wish me luck.



I guess all that time and money I spent going to school to become an automotive technician paid off... (IMG:style_emoticons/default/smilie_pokal.gif)

Glad you got it running right!
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Skid
post May 10 2010, 12:29 PM
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QUOTE(70_914 @ May 10 2010, 09:38 AM) *

QUOTE(Skid @ May 10 2010, 09:53 AM) *

Ok! I figured it out! Boy do I feel stupid. I worked on the car for hours on saturday. I changed plug wires, plugs, rebuilt the carb, adjusted the timing, and a few other things, and nothing helped one bit. I was playing with the timing when the car backfired and my dad noticed that flame came out from the manifold on the dead side. He reached down and stuck his finger over the hole, which was just out of view, and just like that, the car sprang back to life and ran just like before. I guess some little plug that had been there before must have fallen out and caused a vacuum leak. So for those of you who guessed vacuum leak, you win the prize! Thanks for your help and info. I am sure I will be needing lots more of it as I get this little guy back on the road. Next step, emission and inspection, wish me luck.



I guess all that time and money I spent going to school to become an automotive technician paid off... (IMG:style_emoticons/default/smilie_pokal.gif)

Glad you got it running right!


Yeah, I guess, that would help. Thanks again.
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Posts in this topic
Skid   Cylinders 3 and 4 are dead, why?   May 8 2010, 06:27 PM
Tom   Check # 3 and # 4 plugs. Could be fouled a...   May 8 2010, 06:46 PM
70_914   Do you have one of the dual carb tuning tools? Ge...   May 8 2010, 06:50 PM
Skid   I have changed all of the plugs, so I don't th...   May 8 2010, 06:59 PM
McMark   I would rebuild those carbs before I mess with any...   May 8 2010, 07:39 PM
Vacca Rabite   :agree: Lots of little passages that could be plu...   May 8 2010, 07:50 PM
kwales   My bet is ignition problems. With a single carb, ...   May 9 2010, 08:22 AM
McMark   But it's not a single carb. It's dual car...   May 9 2010, 09:28 AM
kwales   OK, OK, I read duel single barrel and brain stoppe...   May 9 2010, 12:37 PM
JamesM   Hurry up and get that thing running, you have a P...   May 10 2010, 01:07 AM
Skid   Ok! I figured it out! Boy do I feel stupid...   May 10 2010, 10:53 AM
Skid   Oh, and James, I will sure try to make it to that ...   May 10 2010, 10:56 AM
JamesM   Yup, i recognize those cars! I was wondering w...   May 10 2010, 07:52 PM
70_914   Ok! I figured it out! Boy do I feel stupi...   May 10 2010, 11:38 AM
Skid   Ok! I figured it out! Boy do I feel stup...   May 10 2010, 12:29 PM
Skid   Ok, so I lied apparently. 3 and 4 are now running ...   May 10 2010, 07:36 PM
Root_Werks   So your Dad got to drive the steel top then? :dri...   May 10 2010, 11:16 AM
Skid   So your Dad got to drive the steel top then? :dr...   May 10 2010, 12:25 PM
JamesM   So your Dad got to drive the steel top then? :d...   May 10 2010, 08:14 PM


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