 #3 cylinder injector quirk, When I pull the lead, nothing happens. |
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| moneysmarts |
 Jul 20 2007, 10:11 AM
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#1
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Member  Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None 
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I thought I had a bad injector on #3. With the motor is running, when I pull the lead to #1, #2, or #4, the engine stumbles as you would expect. If I remove the connector to cylinder 3, however, nothing happens. Even though I was getting a decent spray pattern when I pulled the injector out, I decided to replace the injector. Still nothing. There IS spark at the plug. And my noid light shows that there's electrical pulses at the connector lead. (IMG:style_emoticons/default/blink.gif) On the back of the block, under the air cleaner, I have three pairs of white wires that are solidly grounded.
Any ideas fellas? Thanks |
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Replies
| dr914@autoatlanta.com |
Jul 20 2007, 10:25 AM
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#2
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914 Guru Group: Members Posts: 7,894 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
QUOTE(moneysmarts @ Jul 20 2007, 09:11 AM)  I thought I had a bad injector on #3. With the motor is running, when I pull the lead to #1, #2, or #4, the engine stumbles as you would expect. If I remove the connector to cylinder 3, however, nothing happens. Even though I was getting a decent spray pattern when I pulled the injector out, I decided to replace the injector. Still nothing. There IS spark at the plug. And my noid light shows that there's electrical pulses at the connector lead. (IMG:style_emoticons/default/blink.gif) On the back of the block, under the air cleaner, I have three pairs of white wires that are solidly grounded. Any ideas fellas? Thanks Switch the inj leads front to rear and see if anything changes. If so a lead problem, if not check the compression and check more importantly for intake leaks. Also make sure that you have not installed two bad injectors in a row. Some rebuilds spray fine but when installed do not work properly. Also make sure that the spark for all four cylinders is the same and that the spark plug gap is not closed! |
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| moneysmarts |
Jul 20 2007, 10:31 AM
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#3
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Member Group: Members Posts: 164 Joined: 2-March 04 From: Central Massachusetts Member No.: 1,745 Region Association: None
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George:
Thanks for the quick response. If I switch the leads from front to back, that is move the gray covered lead from #4 to #3, the same situation occurs. pulling #3 cyl. has no effect on idle, and pulling #4 causes stumble. In other words, even if I reverse the leads on the passengers side, I still have the same issue. (IMG:style_emoticons/default/sad.gif) Oh, and plug gaps look ok. I checked to see if there's spark by connecting my timing light to the #3 wire. It makes my light flash, so I think I'm getting spark. QUOTE(dr914@autoatlanta.com @ Jul 20 2007, 08:25 AM) QUOTE(moneysmarts @ Jul 20 2007, 09:11 AM) I thought I had a bad injector on #3. With the motor is running, when I pull the lead to #1, #2, or #4, the engine stumbles as you would expect. If I remove the connector to cylinder 3, however, nothing happens. Even though I was getting a decent spray pattern when I pulled the injector out, I decided to replace the injector. Still nothing. There IS spark at the plug. And my noid light shows that there's electrical pulses at the connector lead. (IMG:style_emoticons/default/blink.gif) On the back of the block, under the air cleaner, I have three pairs of white wires that are solidly grounded. Any ideas fellas? Thanks Switch the inj leads front to rear and see if anything changes. If so a lead problem, if not check the compression and check more importantly for intake leaks. Also make sure that you have not installed two bad injectors in a row. Some rebuilds spray fine but when installed do not work properly. Also make sure that the spark for all four cylinders is the same and that the spark plug gap is not closed! |
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Posts in this topic
moneysmarts #3 cylinder injector quirk Jul 20 2007, 10:11 AM
dr914@autoatlanta.com with a good spark then it has to be a bad injector... Jul 20 2007, 01:13 PM
swl I guess "#3 isn't firing" wouldn... Jul 20 2007, 10:27 AM Vacca Rabite to make bang, you need spark, fuel, and compressio... Jul 20 2007, 11:03 AM moneysmarts I don't know for sure, Zach.
I suppose I can f... Jul 20 2007, 11:09 AM Dr Evil Valves on 3? Had you messed with the harness befor... Jul 20 2007, 11:06 AM moneysmarts Was running fine.
Started to get intermittant buck... Jul 20 2007, 11:14 AM Dr Evil Coolio, the plug will tell...
Not switched wires ... Jul 20 2007, 11:31 AM moneysmarts OK.
Plugs out. On the tan side, and dry as a bone... Jul 20 2007, 11:55 AM swl It is actually easy to break a wire inside the ins... Jul 20 2007, 12:26 PM 2-OH! Bad connection on the injector wires at the plug..... Jul 20 2007, 02:36 PM moneysmarts :headbang: :headbang:
Two bad injectors.
One of ... Jul 21 2007, 11:46 AM Vacca Rabite Rock'n! Glad you got it back on smooth.
... Jul 21 2007, 01:14 PM |
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