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Loss of power with heavy smoking

 
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c raig



Joined: 22 Oct 2005
Posts: 2
Location: maldon,essex,england

PostPosted: Sat Oct 22, 2005 12:47 pm    Post subject: Loss of power with heavy smoking Reply with quote

Does anyone know what would be the cause of heavy smoking(bluey) and significant loss of engine power on my Mazda RX7 1991 . Be great to receive some advice.Many thanks
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What would be the main cause for exccessive smoking (bluey)and extreme loss of power on a Mazda RX7.It has 2 turbos set up in a 2 stage boost situation. Thanks for feedback
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Blake
Been there, done that


Joined: 12 Jul 2005
Posts: 135
Location: Portland, OR

PostPosted: Sat Oct 22, 2005 6:14 pm    Post subject: Re: Loss of power with heavy smoking Reply with quote

c raig wrote:
Does anyone know what would be the cause of heavy smoking(bluey) and significant loss of engine power on my Mazda RX7 1991 . Be great to receive some advice.Many thanks


Whenever I hear those symptoms, I think of a bad Water Thermo Sensor. The WTS is in the back of the water pump housing and is what tells the ECU what the engine temperature is (the gauge uses a different sensor on the back of the engine). If there is a glitch, like an internal short, it can tell the ECU that it is -40F and, thus, to dump fuel into the engine accordingly. My experience with this problem was intermittent; not continuous. Apparently, the ECU detects the problem because the engine can't be running and remain -40F for long, so it ignores the sensor for a while...then suddenly it will act up again, at a most inopportune moment. Not sure if this is the only mode of failure, but it's the only one I've witnessed. Another possibility is the Air Flow Meter, either disconnected or stuck. Yet another possibility is a leaking or stuck injector. Usually, in these cases, you can swap the primary and secondary injectors and see if the problem goes away.
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Blake Qualley
Pineapple Racing, Inc.
(503) 233-3878
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c raig



Joined: 22 Oct 2005
Posts: 2
Location: maldon,essex,england

PostPosted: Sun Oct 23, 2005 8:47 am    Post subject: Reply with quote

Cheers Blake for your speedy response - I will check through your suggestions . I have since discovered that I cannot remove the oil filler cap - does anything come to mind as to why this should be impossible to remove - Also when dipping the oil it appeared to be dirty but then cleaned the dipstick and re-dipped and looked o.k.
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What would be the main cause for exccessive smoking (bluey)and extreme loss of power on a Mazda RX7.It has 2 turbos set up in a 2 stage boost situation. Thanks for feedback
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Blake
Been there, done that


Joined: 12 Jul 2005
Posts: 135
Location: Portland, OR

PostPosted: Sun Oct 23, 2005 9:54 am    Post subject: Reply with quote

c raig wrote:
Cheers Blake for your speedy response - I will check through your suggestions . I have since discovered that I cannot remove the oil filler cap - does anything come to mind as to why this should be impossible to remove - Also when dipping the oil it appeared to be dirty but then cleaned the dipstick and re-dipped and looked o.k.


There should be no reason that the oil filler cap is stuck...force it off. Am I to understand that this car is new to you? Please change the oil ASAP, along with the oil filter. It may be contaminated with coolant and/or fuel. Fuel dilution happens, usually, when the car is flooded repeatedly...but it can also just happen over time and for other reasons (bad oil control o-rings, for example). If you don't know how long it's been, you must change the oil and filter immediately. Coolant contamination usually happens when the coolant seals fail. A good test is to start the car cold with the coolant pressure cap off. If you get bubbles, that's a bad sign.

When you are troubleshooting a car, always make sure to do the basic stuff first.
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Blake Qualley
Pineapple Racing, Inc.
(503) 233-3878
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