My rpm on my 86 NA rises slower then other rx7 NAs tats ive been in...

and it show because my car is pretty slow... recently i couldnt out race my friend in a integra... :S


any suggestions on what could be wrong ?

 

well is your foot heavy enough?

i see you have intake so i cant say that.. i know after i put mine on it litterally moved twice as fast as before

 

is the only problem that it revs slowly? is there anythign else that the car is doing to act funny? coudl you give me more information please?

but you coudl have bad compression, a vac leak somewhere, a squirrels nest in the throttle body maybe? i dunno gimme more info please.

thanks,
matt

 

hmmm

what kidna info do you need

im not sure if there is a bad leak or if i have bad compression... i dont know how to check for that. I will check the throttle body for debris.

Basically my rpms just dont rise very fast when i gas it hard. It jus seems unusually slow to me.

Any ideas on how i could check for vac leaks ? or bad compression ? the motor is 142kms on it its original, has intake just a cone filter ( its kinda dirty), and a straight pipe exhaust 2.5" piping... ive retained the air pump...

uh i duno tats all

 

he he your car used to look like mine http://www.cardomain.com/id/soiaplap

anyways I would check and clean your AFM connection with a good electronics cleaner, as the oil from the K&N will get into the connector when it is freshly oiled.

 

its not a k+N filter its jus a generic one and it hasnt been oiled in a long time

haha ya it does

any more ideas?

 

I'd still clean it and check it out anyways, doesn't take more than 5 mins, my next guess would be the TPS

 

hmmmm

any other suggestions ?

 

hmm well this is what i noticed


it revs fast when its in neutral
but when its in gear it revs really slowly

could there be a problem w/ the flywheel, clutch, tranny ???????

i cheked the throttle body and theres nothing in it appears clean.

 

clogged/faulty injector(s)?

 

how do i check for faulty injectors ?

 

I think an obvious check is the catalytic converter. It is mostly definitely clogged, and is and too much backpressure on the exhuast. It is literally choking your engine.

 

^ he said he has a straight pipe

 

i got a straight pipe man ... meaning no cats

 

no more suggestions ?

 

spark plugs/ wires have 7000 kms on them if tat helps ?

 

How much do the 12" kenwoods weigh?

Sounds like you may just have a tired engine, there are hundreds of threads on compression testing if you want to search...

Have you verified your 5th & 6th ports work correctly? Secondary throttle plates opening as they should? Sensor input voltages to the ECU good per FSM? All kinds of things you could check....

 

i'd say check the 5th and 6th ports and make sure they are opening. with mine wired closed my ar doesn't rev for **** above 5 grand. with them wired open it revs like **** below but nicly above. electric aux comming very soon. goodluck

 

I must have been real tired when I posted...

Anyways the compression check seems to be the next obvious test, as this test is the most important test to the car's power. Its not even that hard of a test.

 

Hmm

my 5/6th ports work, ive watched them go up and down.

No more subs in my car as of now. the rims i have on are bout 1-2 lbs heavier then stock. their 17's.

um my friend said he can do a compression test for $40 canadian. I dont have the equipment to do the compression test thats why ... mmm.... :S

i hope its not the compression ....

 

$40 Canadian? You can buy a cheap compression gauge for $15 USD... I'm sure thats cheaper than $40 CDN .

 

ya it a bit expensive.... but has to b done ...

 

Just buy the compression tester and do it yourself. Seriously its just like changing your spark plugs. The money you spend on having someone do the test can buy you a compression testor and get your test results. When using a regular piston compression testor hold the check valve open and look for 3 even bounces.

 

ok sounds liek a good idea il try it thx

 

When I had my N/A I always thought it was a psychological thing where it just got slower and slower. Then I put a lightened flywheel on, that helped alot with the speed at which the engine rev'd, all mechanical defects aside, a lightened flywheel will make your engine rev faster. A super light one will cause a bit of bogging when dropping the clutch due to the extreme loss in mass, but a 12lb one should do fine.