Answers.com > Wiki Answers > Categories > Cars & Vehicles > Asian Cars > Mazda > Mazda RX-7 > What could cause your 13b 88 rx7 to work better when cold and run worse and struggle at low rpms from 1500 to 3800 and then after 4000 it gets a lot better?

What could cause your 13b 88 rx7 to work better when cold and run worse and struggle at low rpms from 1500 to 3800 and then after 4000 it gets a lot better?

In: Mazda RX-7 [Edit categories]

Answer:

The dreaded 3800 RPM hesitation is cause 90% of the time by poor ground connections between the engine, the battery, and the car. Clean or replace all the under hood ground connections. If there is still a problem after that, look at cleaning the fuel injectors and (on a N/A) that your 5th/6th ports are operating correctly.

First answer by Loredous. Last edit by Loredous. Contributor trust: 34 [recommend contributor ]. Question popularity: 37 [recommend question].

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