No throttle response and hard miss

[Timeless513]

i have an sr20det redtop in a 89 s13 chassis that i have been working on for a while now and i am stumped at this point. it has absolutely no throttle response and it has a hard miss when started all the coils are good spark plugs are good it will run for about thirty seconds then shut off because of the miss and im absolutely stumped as i said if anyone has any suggestions of what to look for or knows what i should do any help would be appreciated thank you

[Timeless513]

Any ideas? Could the tps be the throttle response problem?

[yoni_nismo]

check timing sounds like its off

[Timeless513]

well we checked the timing all the spark plugs and coils i was thinking tps might be why i dont have throttle response thats the biggest issue im having im sure i can find out why the miss is there but the throttle response is where i am stumped

[Timeless513]

bump me please help

[wow-thats-a-cool-car]

has to be timing!!!

[slick_s13]

You may want to check out the timing chain it's self as apposed to the Ignition timing from the crank pulley. it may be possible that it could have skipped a tooth.Sorry that i couldnt be more help. Also, i recently made a mistake in adjusting my timing. the timing marks are in order from left to right 10ATDC TDC 10BTDC 20BTDC 30BTDC and 40BTDC....just incase.

i misunderstood the marks myself at first and i had the EXACT same problem...turns out mine was retd, 15 degrees... :[

remember they are in increments of 10...as i thought they were 5 lol if you have a SOHC the stock is 15Deg or half way between the 3rd and 4th tick mark from the left. and for the DOHC is 20 deg. or right on the 4th tick mark from the left.


hope that helps!

[steve shadows]

i have an sr20det redtop in a 89 s13 chassis that i have been working on for a while now and i am stumped at this point. it has absolutely no throttle response and it has a hard miss when started all the coils are good spark plugs are good it will run for about thirty seconds then shut off because of the miss and im absolutely stumped as i said if anyone has any suggestions of what to look for or knows what i should do any help would be appreciated thank you


Bad ignition grounds, check plugs and plug gap, check fuel pressure, check fuel pump condition, check injectors and check MAF sensor wiring

[Timeless513]

thank you for all the help i am going to be working on it more tomorrow so i will find out more then and post if anything helped