help-- I think my car is getting mad with me!

93GTDIN · 09-11-2002, 11:45 PM

I was driving on the highway today about 60 mph, when all of a sudden, my tach needle drops drastically to about 600 RPM, and for lack of a better description, bounces around. Eventually it popped back up to about 1700 rpm or so and ran fine for two minutes. DId the same thing again,and when the rpm's shot down, the engine seemed to miss horribly, maybe even backfire, but it was relatively quiet. Only think i'm confused about is why when the enginespeed dropped, the car didn't slow down. My first suspicion was ignition so I made sure all the wires were on pretty good. After inspecting the motor and deciding I couldn't see anything wrong, I drove it home and it didn't misbehave. Ten minutes after I arrived I took it for a ten minute (approx) drive and it did fine. So as of the current moment, I havent been able to reproduce the problem. Here are some possible problems I have conjured up, please help me add/dismiss theories.

-air in the fuel rails
-plug wire going bad
-cap/rotoir wearing prematurely
-transmission failure

09-11-2002, 11:45 PM	#1
93GTDIN Registered Member Join Date: Jan 2001 Location: Live music capital of the world, TX Posts: 324	help-- I think my car is getting mad with me! I was driving on the highway today about 60 mph, when all of a sudden, my tach needle drops drastically to about 600 RPM, and for lack of a better description, bounces around. Eventually it popped back up to about 1700 rpm or so and ran fine for two minutes. DId the same thing again,and when the rpm's shot down, the engine seemed to miss horribly, maybe even backfire, but it was relatively quiet. Only think i'm confused about is why when the enginespeed dropped, the car didn't slow down. My first suspicion was ignition so I made sure all the wires were on pretty good. After inspecting the motor and deciding I couldn't see anything wrong, I drove it home and it didn't misbehave. Ten minutes after I arrived I took it for a ten minute (approx) drive and it did fine. So as of the current moment, I havent been able to reproduce the problem. Here are some possible problems I have conjured up, please help me add/dismiss theories. -air in the fuel rails -plug wire going bad -cap/rotoir wearing prematurely -transmission failure __________________ 96 Cobra - a bit too stock. 14.0 @ 101