I Just bought a GTX and the guy said it would only idle every time he tried to give it gas it would die.I got it home and charged the battery and it started up a couple times and ran like crap. I took the raves out (wich were nasty) and cleaned them. Now it loses its fire. will fire when you first turn it over then it hesitates and turns over better and will no longer fire. After several times of this it will give a great big backfire? Any suggestions??
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96 GTX will not start, just backfire
- Thread starter mpscott2
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To start with what is the compression of the cylinders? Do you know how to do a proper compression check. You'll need a compression tester. Go to Auto Zone. I think they sell for like $25.00. The compression gage, will screw in the cylinder head in place of the spark plugs. To test compression, remove both spark plugs. Place spark plug caps on the plug cap studs near the cylinder head to ground the empty caps. This completes the circuit of the ignition electrical system and prevents any electrical problems from the caps being un grounded. Using the correct adapter for the threaded end of the tester,( same length of the spark plug threads length)Screw in the tester in one plug hole. Hold the throttle wide open. Push the start button. Watch the compression gauge, when it peaks out at the most compression, let go the start button. Read the psi number. I would do it 3 times to be sure it is accurate. Check both cylinders the same way. The ideal compression is 150 psi per cylinder. If it is less, it's not a problem as long as they are close to being the same. If the psi is less than 90 it might need be time for a tear down and a rebuild. If the psi in 1 cylinder is say 140 psi and the other is 80 psi you need to tear down and repair. This difference is a lot and there is a problem.
The battery must have a full charge on it to fire correctly also. If you need to have the battery load tested. Bring it to like Auto Zone to have it checked for free. Check the lanyard to be sure it is working correctly. Does it have fresh fuel? Let me know how you make out, and we'll try to get it running for you.
Karl
Karl
The battery must have a full charge on it to fire correctly also. If you need to have the battery load tested. Bring it to like Auto Zone to have it checked for free. Check the lanyard to be sure it is working correctly. Does it have fresh fuel? Let me know how you make out, and we'll try to get it running for you.
Karl
Karl
Compression is great
It is 140 on both cyl. Its wierd, I can pull one plug and ground the one wire on the term. (leave one plug with wire attached) and start it on one cyl. turn it off put other plug and wire back and it will start right up. Wont rev up great at first but within 4-5 seconds it revs up great.
It is 140 on both cyl. Its wierd, I can pull one plug and ground the one wire on the term. (leave one plug with wire attached) and start it on one cyl. turn it off put other plug and wire back and it will start right up. Wont rev up great at first but within 4-5 seconds it revs up great.
Check to see it it has the Grey fuel lines on the engine.If it does they need to be replaced with new black lines. Replace the clamps too while you at it, use stainless steel replacements. The carbs will need to be cleaned also the internal filters will collect crap and clog up. Be careful not to damage or tear the diaphragms or you'll need to buy new rebuild kits.
Karl
Karl
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