hey guys, got a problem and i can't figure out how to fix it

when i shift at redline, my rpms drop slowwwly until it catches around 5000
it's supposed to drop down right away

this usually only happens when i have under half tank of gas

car hesitates sometimes too
this is in the low rpms when i go from a stop

i changed the fuel filter in the winter and seemed to fix the hesitation problem but it's back again now

could the clogged fuel filter cause my fuel pump to start failing like this?

 

What car and transmission do you have?

 

91 crx si
sohc zc

 

check your fuel pressure to see if that is your problem

 

The fact that your RPM drops slowly after a shift if strange. You would think that insufficient fuel would make it drop faster than usual. Has you fuel mileage dropped recently? Have you checked for vacuum leaks?

 

for mileage i get around 550 km on a tank
not sure what it is in mpg

any tips on how to check vacuum leak?

 

oh i'm also putting on my turbo this weekend
can i go ahead with that or should i wait until this is all fixed?
might make me run lean?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xDiMSuMx &raquo;</TD></TR><TR><TD CLASS="quote">for mileage i get around 550 km on a tank
not sure what it is in mpg

any tips on how to check vacuum leak?
</TD></TR></TABLE>

You can carefully listen for a hiss.

Or...

You can spray some (not much) carburetor cleaner around the vacuum lines and the intake manifold while the engine is running. Listen for an idle surge.

Or...

Start the car with the air intake removed from the throttle body. Seal the throttle body with you hand. If the car keeps running, you have a leak.

 

thx dogginator
i'll try it tonight and tell u how it goes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">

You can carefully listen for a hiss.

Or...

You can spray some (not much) carburetor cleaner around the vacuum lines and the intake manifold while the engine is running. Listen for an idle surge.

Or...

Start the car with the air intake removed from the throttle body. Seal the throttle body with you hand. If the car keeps running, you have a leak. </TD></TR></TABLE>

coudln't hear a hiss except coming from the intake

don't think i can use the carb cleaner thing because my idle is surging anyways

covered the throttle body and the car just turned off

 

Surging idle can also be caused by a vacuum leak. Have you tried to set your idle recently? Have you made any changes to the fuel or air systems?

 

i did try to set my idle a bit higher but the problem was happening way before that already

no changes to fuel or air recently

i have an intake and exhaust

i'm actually putting on my turbo this weekend and was hoping to get it fixed up by then