Having problems with your 1990 Mercury Topaz ?
1990 MERCURY TOPAZ
\015 It will start but acts like it is running out of gas, computer code says egr or charcoal canister. Has a new fuel pump, fuel pressure regulator, map sensor, O2 sensor, canister has been eliminated along with catalytic converter, I can force it to get me down the road, but I have to put it in neutral at red lights. Throttle position sensor checks good, air bypass checks good. MPG went from 30 to about 10?\015
Sounds like your egr valve is stuck open. check for false vacuum signal to egr valve holding it open or for a plain old bad stuck open EGR valve.
Repair Help & Product Troubleshooting for 1990 Mercury Topaz
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