Engine chugs
Thread Starter
Heel & Toe
Joined: Jul 2015
Posts: 18
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Engine chugs
I just bought a 86 Convertible with 31,000 miles in July. One thing I've noticed is that the engine chugs a bit every time it reaches 20-25 mph or 1000 rpm or so. It does it every time. I'm thinking it's transmission related. Any thoughts?
Melting Slicks
Joined: May 2014
Posts: 2,890
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From: New Port Richey FL
If its a Automatic, Does the Chug go away with lightly laying your foot on the brake pedal just enough to get the brake lights to come on, which could indicate the lock up converter is coming in way early.
Last edited by s carter; Sep 5, 2015 at 07:02 PM.
Thread Starter
Heel & Toe
Joined: Jul 2015
Posts: 18
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It's an auto. I will have to try your test next time I take it out.
Oil Producer
Joined: Apr 2014
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Safety Car
Joined: Sep 2001
Posts: 4,153
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From: Glenbeulah Wi
More then likely it is the lock-up converter and the repair is a new chip to raise the lock-up speed. The factory setting is too low in my opinion and causes the engine to chug.
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Melting Slicks
Joined: May 2014
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From: New Port Richey FL
Oil Producer
Joined: Apr 2014
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However, I encourage you to unplug the electronics from the 700r4 and just make sure first. That is what I did. this will not allow the tcc to lock up at all. it will not hurt the car, and if your problem goes away, then you know its the tcc causing the issue. then move on to bjansk's suggestion. when you find a chip, can you post which one you get? i need to buy one as well. right now the car is running without the tcc. so, my mpg is a bit lower.
its on the driver side. reach under there and disconnect it. picture here:
http://www.700r4.com/tech/tcc/brake_...nnector_bg.jpg
Intermediate
Joined: Sep 2012
Posts: 26
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Wait if it is the converter causing your problem this means the lock-up solenoid is stuck or broken and needs to be replaced this can be done by removing the pan on the transmission the solenoid is located in front of the valve body with 2 10mm head bolts holding it into the pump body there are 2ways they sell this part the solenoid by itself where you cut the wires and splice it in or with the whole wire harness which is simply remove old and plug in new, the solenoid alone cost around $30 and the whole harness is about $60