# WTF Bad Ground On lancer

**URL:** <https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736>\
**Category:** NYSpeed Automotive\
**Created:** [November 30, 2009, 8:58pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736 "2009-11-30T20:58:17Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![diddyof2h2h](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/diddyof2h2h/32/4978_2.png) [@diddyof2h2h](https://forums.speedlife.net/u/diddyof2h2h)\
**Post date:** [November 30, 2009, 8:58pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/1 "2009-11-30T20:58:17Z")

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ive been tracking down grounds, cleaning and replacing them, when i brake at red lights and put a brake load on the engine the rpms drop to 400-500 causing the engine to run rough at idle but at rps high than 1000 the vehicle runs normal. is there any know ground to go bad on lancers that have been a common problem. any input will help thanks in advance.

Sidenote it gets worse when the headlights are on.

please keep the ball busting to a min.

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**Author:** ![pirite](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pirite/32/5308_2.png) [@pirite](https://forums.speedlife.net/u/pirite)\
**Post date:** [November 30, 2009, 9:09pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/2 "2009-11-30T21:09:16Z")

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does it only happen when you push your brake pedal or is it anytime youre just idling?

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**Author:** ![diddyof2h2h](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/diddyof2h2h/32/4978_2.png) [@diddyof2h2h](https://forums.speedlife.net/u/diddyof2h2h)\
**Post date:** [December 1, 2009, 12:32pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/3 "2009-12-01T12:32:11Z")

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mostly at red lights idling, happens more when its wet and the headlights are on

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**Author:** ![pirite](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pirite/32/5308_2.png) [@pirite](https://forums.speedlife.net/u/pirite)\
**Post date:** [December 1, 2009, 12:39pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/4 "2009-12-01T12:39:59Z")

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check your cap and rotor and if theres a cover under the rotor check that too. that was the issue with my car when i was having the same issue as you.

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**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\
**Post date:** [December 1, 2009, 12:52pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/5 "2009-12-01T12:52:29Z")

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you can make a quick, extra good ground by connecting jumper cables from your negative battery terminal to your engine block, and another from the negative batter terminal to the chassis.

That said, i don’t think this sounds like a grounding problem.

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**Author:** ![ubengineering](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ubengineering/32/5171_2.png) [@ubengineering](https://forums.speedlife.net/u/ubengineering)\
**Post date:** [December 1, 2009, 3:51pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/6 "2009-12-01T15:51:27Z")

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idk about a grounding problem, but last time my car acted shitty at idle when it was wet with a load on the alternator, and or not wet with a load on the alternator, it was, the alternator =p

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**Author:** ![diddyof2h2h](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/diddyof2h2h/32/4978_2.png) [@diddyof2h2h](https://forums.speedlife.net/u/diddyof2h2h)\
**Post date:** [December 1, 2009, 9:46pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/7 "2009-12-01T21:46:23Z")

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pirite, its a distributerless system.

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**Author:** ![burnt\_toast](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/burnt_toast/32/7518_2.png) [@burnt\_toast](https://forums.speedlife.net/u/burnt_toast)\
**Post date:** [December 1, 2009, 9:52pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/8 "2009-12-01T21:52:49Z")

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sounds like an alternator issue.

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**Author:** ![psychopjv](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psychopjv/32/7251_2.png) [@psychopjv](https://forums.speedlife.net/u/psychopjv)\
**Post date:** [December 1, 2009, 10:22pm UTC](https://forums.speedlife.net/t/wtf-bad-ground-on-lancer/76736/9 "2009-12-01T22:22:41Z")

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check the check valve for the brake booster.