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#1
IP: 63.139.175.34
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Another stalls when put into gear thread
I'm in the process of getting an old A4 running in my "new to me" Catalina 30. After discovering and replacing a broken exhaust valve the engine still doesn't want to idle up and sometimes stalls when put into gear. I've checked the prop for fouling, checked and rechecked the firing order and timing, checked the exhaust (and even ran it disconnected to verify potential clogs/collapses) I've got compression and I have spark to all cylinders. I'm about to rebuild the carb but noticed last night that the ignition coil had oil in the top of it where the coil wire connects. Is this normal and could this be the source of my grief?
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#2
IP: 155.186.124.219
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The coil should not leak oil, replace it. Not wanting to idle in gear is usually "tune" related. IE idle speed, idle mixture, timing and/or stuck C-advance or an air leak. Once you know the timing and spark are good and it still dies it would be time to look to the carb, fuel and fuel delivery.
Did you check the C-adv? How do the plugs look, piics would be nice? Are you sure the valves are adjusted properly and supplying good compression? Dave Neptune |
#3
IP: 70.185.132.167
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Is the choke adjusted correctly so the choke is open\closed all the way when you think it is?
ex TRUE GRIT |
#4
IP: 67.176.202.156
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well, I am assuming "late" model A4. Does it have distributor points or electronic ignition?
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#5
IP: 99.255.196.148
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I chased two stalling problems for a while, which I eventually fixed by:
1: clean fuel. I had around 10% water in my fuel, the engine would run at low power, but stumble and die in gear or under load. I pumped out the tank, replaced the Racor, changed a deck-fill o-ring (water had to come from somewhere). 2: low fuel pressure due to a blocked polishing filter. Same symptoms; I added a small in-line fuel pressure gauge after this incident, which would have narrowed down the possibilities rapidly. Changing the filter immediately cured this. Are you sure you have clean, dry fuel? Do you have a fuel pressure gauge? I used a $20 'Mr Gasket' which users here recommended. |
#6
IP: 69.250.111.245
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Catfish, Welcome from a fellow C-30 owner!!
These are all good questions, and each one valid. Work thru all responses one by one and we can help. In addition to the data points you've already provided, we are gathering data to help diagnose the potential problem. If you aren't sure how to answer one, just ask, we can help (Advance, Electronic ignition, etc.)
__________________
-Shawn "Holiday" - '89 Alura 35 #109 "Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!) |
#7
IP: 70.185.132.167
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Another Thought Or Two
Quote:
A cold A4 needs to warm up at fast idle for a minute or two before it will idle normal and shift into gear without stalling. A bit of choke usually will speed up the warm up process. A good diagnostic test is to see if the engine runs better with a bit of choke. If it does there is a problem in the fuel system. Welcome to the forum. Your engine will run correctly. ex TRUE GRIT |
#8
IP: 35.143.197.21
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Whew. That's alot to take in lol. As far as timing I've just checked with a light to make sure I had the distributor close. I tuned by ear and the timing mark is close at idle. The engine now starts immediately, runs great, and has a responsive throttle. However when eased into forward gear struggles to stay running. I verified the choke was in the open position and the engine starts to bog down when I apply it while running. I ordered a replacement coil and cleaned the carb out. I also verified operation of the electric fuel pump and oil pressure switch. Hopefully I can find some time to get back at it tomorrow evening. I plan to delve into the distributor. It's a late model engine with points ignition. I haven't checked the advance or springs yet. Sorry if I'm missing some answers to your questions. I didn't expect so many responses....but I appreciate them!
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#9
IP: 138.207.175.104
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Just curious... Does it also bog down when you do the same thing in reverse?
Bill |
#10
IP: 71.38.107.125
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When was the last time you checked your STUFFING BOX?
__________________
-Jerry 'Lone Ranger' 1978 RANGER 30 |
#11
IP: 174.228.15.113
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It goes into reverse just fine and stays running. I have spun the prop shaft by hand in neutral with ease, but I have not taken the stuffing box apart for repacking yet.
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