Hi, I think my car might be having problems. When accelerating it struggles to rev over 4000rpm. When it reaches 4000rpm the car starts to choke/jerk, and it cant really produce more revs past 4500rpm. The most recent mod was my pod filter about 2 months ago, and I noticed this problem about a month after I had it installed. Other mods are BOV and 3" TBE, the engine is otherwise all stock. It's an my99 wrx. Any help would be appreciated.
Thanx.

Sounds like boost cut.

Go to a workshop to have them diagnose it for you.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]

Your airflow meter is probably rooted. Take it out, spray it with circuit cleaner (or metho) and hope for the best. You will probably find your new pod filter (oiled i assume) has accelerated the demise of your afm.

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deadly treadly

Afm Ftw.........

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MY04 WRX CLUBSPEC 7

Get rid of your oiled pod filter and try cleaning your AFM. If that fails you'll need to buy another AFM element which will cost you $200-300. Oiled filters contaminate the AFM and the MY99/00 model's AFM are particularly sensitive to this issue.

Had a similar issue on my 02 WRX. Issue was my stupidity. Installed a new Intercooler and didn't fasten the throttle body hose correctly. When it got into the higher RPM range .. Drove like you have mentioned, jerky .. hesitating ..no boost!

Dont even bother with oil filters, its not worth the risk especially with MY99. Think MR_PSI's selling a V5 afm, should be a straight swap?

Try as the other guys said. If that dont work check fuel pressure out of pump.

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11.1 @ 127mph

thanx for the response guys
Im using an apexi power intake...its a dry filter, so no oil.

So i guess I should start by checking my afm....hmmm....

Not to throw a spanner in the works, though if it was the AFM shouldn't it happen at low revs as well?

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