Block the EGR valve

S14 Tech Guides

 

The Exhaust Gas Recirculation (EGR) Valve and EGR Control Valve (EGRC-BPT) were fitted on S14s only to reduce exhaust emissions and not much else. They do, however, have the nasty side effect of causing a noticeable power hesitation at 2300-2500 rpm.

The EGR and EGRC-BPT can be disabled very easily to eliminate this hesitation and have no ill effects on the rest of the engine. In fact, these valves were left off the S14a and S15. Their removal should have no effect on your MoT emissions testing.

A number of people have completely removed the EGR circuit from the engine. This is more complex and doesn't achieve anything extra except tidy the engine bay a bit more.

 

First, locate the EGRC-BPT and EGR valves. They are fitted between the bulkhead and plenum. Remove the pipe arrowed on the EGRC-BPT (Figures 1 & 2).


EGR locationFigure 1

 


The pipe in questionFigure 2

 

Block the pipe with an appropriately sized bolt or screw and tuck the pipe out of the way.


Block the pipeFigure 3

 

Yes, that's it! No more irritating hesitation.

Christian Jull

During his 'car years', Christian owned, ran and modified a Nissan 200SX (S14) and Nissan Silvia Spec R (S15). He was an active staff member of the UK 200SX Owners Club and one of the founding members of the S15 Owners Club. He owned and administered the club for ten years. Over the course of five years of Nissan ownership, Christian wrote modification guides to aid others. These guides have proved very popular with 200SX/Silvia owners all over the world.

Included with the guides is a record of car ownership over a ten year period.

Christian is now car-less and lives in the public-transport-friendly city of Helsinki in Finland.