Question about 1989 Mazda RX-7

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My rx7 waste to much gasoline i did a tune up and the motor still shaking and i change also the computer but it is the same, i put a new injectors on it, it was work good just for a few minutes... wat more i have to do to fix the problem

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Is there a tbelt or chain did you do comp test on cyls

Posted on Dec 30, 2010


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1 Answer

Idle speed is shaking up and down

black exhaust = over fueling
so there is an injector problem either in the seals under the injectors or in an over pressure problem
The sensor that controls the air / fuel mixtures is the heated oxygen (HO2S) that is in the exhaust manifold before the cat converter and that often fails and so the ECM cannot control the injector operation
have the fault codes run before you waste any more money replacing items not connected to the problem

Sep 11, 2017 | 1998 Land Rover Discovery

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Car is missing and shakes alot.

Check if the car's computer is firing each and every fuel injector by listening to each injector when the car is running, or using a noid light attached to the harness, at each injector site.. Maybe try a tune up that changes the spark plugs, wires, and air filter as part of normal maintenance.

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1998 chevy blazer

Well there could be many reasons for tht.In the 98 blazer they are using 8 injectors in the gulf modles i think its the same around there . did u have a pressure check for the cylinder n05. if the pressure is ok.then check the injector harness buy unpluging the number five while the vehicle is start and warm.conect it back and check the other injector if u feel there was no change to the idle while u unpluged the injuctor num5 so i guess u need to clean the injector by taking them out you need a complete tune up by romoving ur injectors and manually checking it. Reffer to a machanic or replace tht injector if u think u can do it.. i think its a better job to be done by an expert case wrong installation can lead to a vehical fire...

May 18, 2010 | 1998 Chevrolet Blazer

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87 rx7 floods, won't build compression. changed

sounds like you may have a leaking fuel injector. put a fuel pressure gauge on it and watch the pressure with the key on and with the vehicle sitting for an hour with the key off

Nov 23, 2009 | 1987 Mazda RX-7

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Toyota vits 2005 shaking engine

Very possibly you have a bad motor mount. Is the engine missing or running smooth but shaky? If it is missing, then it may be plugs, wires, or injectors, if runs fine but shaky, then you may have a bad motor mount.

Aug 25, 2009 | 2007 Toyota Yaris

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Due to multible ankle surgerys my 99 dodge durango sat for the last 8 months I started it in december of 08 started right up while it was running it just stopped dead no shaking or motor coughing just...

My approach would be to check the fuel pressure coming to the fuel rail. It's possible the fuel line itself could get clogged. I know gasoline can turn into a varnish and clog up injectors, etc. Good luck.

Jul 03, 2009 | Dodge Durango Cars & Trucks

1 Answer

The cilynder #1 and spark plug is wet with gas,I did chenged the injector an fuel pressure regulator,still the same engine is shaking, nissan sentra 1993

Did you change the spark plug?? Your car (1993) has a distibutor assy, which means it has ignition wires for each plug. How are your wires??cap?? rotor?? Have you ever done ignition tune up?? If the answer is yes and you have already installed new injector and pressure regulator (althoug it still could be a injection issue/ECM or computer, because ECM is what drives the injectors. If the ECM or wiring to #1 injector has an issue, the injector will not fire off and put gas into the cylinder, resulting in a misfire.) Remove #1 injector connector and check to see if you have power/12V on one side of the connector. If you have 12V there, than check the other wire for continuity to the ECM. You will need wiring diagram to find the right wire color at the ECM. That other wire goes into the ECM to the driver which opens and closes the injector depending on your demands as far as gas pedal input. That driver may be bad, causing the injector not to shoot gasoline. Than I would be looking into a engine issue, such as burned valve, or head gasket problem (coolant getting into #1 cylinder, flooding your spark plug). Tough to diagnose over the computer and not looking at it my self. Let me know what you find.

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1994 nissan maxima - car shaking and engine light on

change your spark plugs first ngk or better.30-50$. ... a good air filter 10-45 $ k'n is best
your shake problem is gas or air related..

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