Question about 1993 Chevrolet Corvette

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Engine miss firing

The engine started missing . I have changed the spark plugs and wires. Where do I go next?

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Check compression on engine and if that's good then check injectors(may be bad) . The key to use when checking compression with a compression guage is NOT have your reading be more than psi difference between cylinders. For example is cylinder #1 is 150 psi and cylinder #2 is 172psi then there is a problem like a burnt valve or something . From my experience these types of misses usual come from bad plugs, wires or bad injectors. Good luck and thanks for using FIX YA

Posted on Feb 28, 2009

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My 99 s10 all at once started missing realy bad like its only running on two cylinders ??????


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Nov 29, 2012 | Cars & Trucks

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Hey 94 TOY...

When did the problem start? Before you changed the wires and plugs? Or did it start, AFTER you changed the wires and plugs? Did the problem remain the same BEFORE & AFTER you made the changes?

1 - If the TOY ran fair to Okay before you did the work, then you may have done something wrong when you made the cahages. Check for correct plugs and firing order. Check for cross wiring. With engine runing pull one plug wire off each plug one at a time. Each pulled plug wire will slow down the engine. When you pull a plug wire that doesn't react and does not make any change ON or OFF that cylinder Plug.
Then that cylinder is not firing.

2 - Check for spark at that wire. If you do-not have Spark there, But the other wires do... the wire going to that cylinder is BAD.

3 - If you have the correct firing order and spark at all cylinders then the cylinder that did-not change the speed of engine has a compresstion problem. Bad valves, Piston or rings are bad... Major engine work and Major repair bill for the repair job.... GOOD LUCK....

Oct 15, 2012 | 1994 Toyota Pickup

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2007 Pt Cruiser I Changed spark plugs 2 weeks ago Bosch Platinum +4, car is non turbo 2.4 ltr engine. within 1 day engine light on cylinder 1 miss fire, read on the net changed plugs to Champion RE14MC...


remove the plug from the #1 cylinder, and install it into the #2 cylinder , and put plug from # 2 clyinder in to #1 plug hole, connect plug wires, and start up vehichle, and if computer shows misfire on # 2 cylinder , then you have a bad plug, possibly porcelin insulator could have a hair line crack in it, hope that this information has helped you.

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My 95 monte carlo 3.1 has just started miss firing after i changed the spark plugs and wires


DID YOU GAP SPARK PLUGS AT 0.060 FOR 3.1L ENGINE OR 0.045 FOR THE 3.4L ENGINE.DID YOU BUY AC R44LTSM SPARK PLUGS. DID YOU BUY AC DELCO SPARK PLUG WIRES.BECAUSE IF YOU BUY WRONG TYPE SPARK PLUGS AND WIRES CAR WILL MISFIRE.

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My husband did a tune up on my car yesterday and now it wont start it will turn over like it wants to start but it wont he said that its miss firing we have bought 3 new coil packs and still will not start...


If your car is miss firing and your husband changed the coil packs,the wires leading from coil packs to sparkplugs must have got crossed.This will change car timing which will result in the car miss firing.He needs to go over wiring and correct problem for car to run right.You can go online to autozone.com and type in Info about car to get the correct wiring layout.Your problem isnt the new plugs n wires.Its the wiring layout.

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Missing? and fuel problem


You probably have one plug not firing. First, check all your plug wires to make sure the boot is pushed on all the way. If there is no improvement, you can pull one plug wire off at a time (with the engine running). If the engine doesn't die, or change when you pull a plug wire off, that will be your bad plug. It should change drastically when you pull a wire. Be sure to use a spark plug wire puller, or a heavy rubber glove. Check for spark in all your wires with a timing light.
If there aren't any dead plugs or wires, the next thing to check is the timing. Aim a timing light at the timing mark on the crank. If the mark jumps around a lot, the timing belt or chain has jumped, and will need to be replaced.
If that checks out okay, the next thing to do is a compression test. You may have bad valve.

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2 Answers

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Next step would be to check the compression in that cylinder and compare it to the others.

Oct 04, 2009 | 1997 Mazda 626

1 Answer

What is the meaning of 98 Honda Civic error codes P0300 P0303 P0304? Engine will not start, does not seem to fire.


P0300 indicates that there is multiple miss fire in the ignition system. P0303 and p0304 indicates the miss fire is in cylinder #3 and #4. Replace the spark plug, and wire set, and rotor and cap if there is one. Can not remember if there are coil packs on the civic, the age thing. change the fuel filter and clean out the fuel injectors with fuel injector cleaner for the next 3 full ups. When the spark plugs are removed, inspect them for condition, if there clean or dirty with carbon build up. which would indicate how the engine is running. Keep me posted and drive safe.

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4 Answers

2001 oldsmobile alero


I have a car in the shop right now same thing - it is being caused by a misfire. Need a real technition to diagnose the problem (auto zone - advance auto can't diagnose the problem - only read the code)
mine was caused by a failing fuel injector. good luck

Jun 26, 2008 | 2001 Oldsmobile Alero

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