Sr stock redtop hesitation at a steady speed only?

[dtowndrifter]

for some reason my motor has always hesitated or bucked or jerked at one steady speed...Like in a school zone, i throw it in third gear an do 20mph, but it will not hold 20 steady...It will buck...Gets on my nerves..I've changed spark plugs...fuel filter is fairly new..pump is fairly new..pressure is steady...no couplers are tight..no rubbings of intercooler no where /leak..swaped out coilpacks same thing...tps sensor is set occordinly...O2 sensor is fairly new..all i can think of is an could be injectors...

o yea no codes..stock redtop sr t-25..timing at 15

whats the sign of a faulty injector?

[s13-t]

run a second ground from the motor to the chassis and another from the batt to the chassis. could be wrong but worth a try...

[dtowndrifter]

did another ground no fixin the prob..

ok this car is still sputtering/misfiring...right when i'm giving it light throttle like at 2 grand/rpm maybe 2500 EVEN WHILE THERE IS NO LOAD......absolute headache..

Changed out the MAF, TPS, O2 sensor, Coilpacks, Spark plugs, Ignitor, Cas, Knock sensor, Pcv valve, great fuel press..no vac leaks. no boost leaks. check for leaky bov..checked boost controller...disconnected boost conroller and bov..checked to see of the coil pack harness was grounded and is...no grounding out on the harness either....tps within voltage spec..has resistance so does knock sensor..

Only things that Havent been checked are injectors or ecu..maybe and possibly the wire harness..last but not least...hell i dont kno..

[CSUPUEBLOTIM]

Have you checked for any vac leaks.

[dtowndrifter]

yes

[CSUPUEBLOTIM]

Did you use a machine or just visual and sound?

[dtowndrifter]

visual and sound..found i had a leaky hks bov...so replaced that.. still same problem...the only thing that hasent been checked now is the injectors..

[dtowndrifter]

turns out to be a bad ground from the battery to the chassis i did...lol...omg...

[mizono]

i have the same problem with my car. what exactly was wrong with the ground between your battery and chassis?

[dtowndrifter]

the problem with the ground was that i didnt sand the the surface..i had it bolted to the rear tow hook bolt...i had used a brass terminal that was gold plated..like the stereo type terminals..i now ran it to the spare tire mounting point..with a copper terminal....

but this is why my car was hesitating as i thought this was the problem...

it was my ecu..now i need a sr ecu..