i have a type r block with b16 head and 310cc injectors. my car starts and idles fine but wen i step on the gas a lil bit and it reaches 2500 rpm and over it starts to shudder and car shakes and doesnt wanna go and when i let go of gas it goes back to idle which is at 800-950 please all comments are welcome

 

Sounds like you are trying to use a stock ecu, get it tuned.

 

hmm is there any other thing that might cause it tuning and chipping cost around 500 here

 

put stock 240cc injectors in if you dont want to tune it. if you dont do anything, that much gas will wash down the cylinder walls (after prolonged use) and score them.

 

if you have a stock ecu with no afc or chip, and those injectors, then that is 100% the problem

 

i have a vafc do you have a link to the settings i can adjust it to

 

There are no settings that will magically cure it. That too has to be tuned not to mention an AFC is a bandaid that although "usable" in the right hands, too much adjustment will throw timing out of whack because of how it adjusts. Just put the stock injectors back in if you aren't willing to do it the right way man.

Case in point, I did a motor for a guy a year ago, initial compression test after breakin was 275-280 across the board. He drove it around for a year on a base map although myself and many others told him to get the thing tuned. Now it's bogging and making no power at all. Did a compression test for him last week, 180 was the highest it went. Over a period of time, extremely rich conditions will kill a motor man.

 

it didnt come with stock injectors so guess ill jus save up then

 

If you look around the classifieds here and ebay, you can snag a set of stock injectors for 35-40 bucks all day long. That will be a start to curing your bogging until you get the cash for a tune and your motor will thank you.

 

hmm kk what will cause the rpm to flucuate from 1k-9k jus sitting there idling lik that its jus the tach not the motor that idles up and down

 

kk rebumping thread for more answers i got stock injectors and stock fpr motor stays on now and idles fine but wen i try to rev it past 2k+ rpm it starts to bogg out and stutters but doesnt turn off symptoms? fuel filter dizzy? could me doing the timing belt wrong be the problem?

 

ahh still got the problem wen i unplug the tps sensor it bogs out at a higher rpm but wen i plug it, it bogs at 2-3k then wen i rev highest it is fine what could be the problem? did i adjust it to the wrong voltage or its not seating properly please help changed fuel filter cap and rotor spark plugs



Modified by Baodalazi at 7:25 PM 5/14/2007

 

I'm no expert but try asking round and see if it might be your fuelpump. Sometimes with some cars the fuelpump can't keep up. I had a Saturn that wasn't gettin enough fuel to the motor. You would think that it would sputter but it just bogged it down. ask Someone else first before you buy parts. like I siad I'm no expert.

 

its your TPS its not reading your throttle being actuauted and does not increase fuel or timing.

chech your map and IACV while you are at it

 

hmm got a new tps drives fine at first but wen i stepped on it afterwards it started bogging real bad

 

what throttle body do you have? you need to calibrate the tps, could also be a fuel shortage issue or your coil is going out

whAt are the symtoms now?

 

check for vaccuum leaks also, they are a b*tch

 

new cap and rotor as for vacuum leaks everythings tight and none of the hoses are cracked

 

i had a vccuum leak of off the grommets being bad on the black catch can on the back of the block....

you cant be more thorough than to replace old stuff with new, but it does cost money