m20 stuttering issues

[ZekeTheSneak]

Just completed a road trip to cali and back from washington, well long story short car performs fine doing 80 on the freeway but sort of stuttering and bogging when under load going from 0 to 60. I've heard cps and fuel can be at fault, opinions and questions

[StereoInstaller1]

first sign of weirdness on an M20, look for vacuum leaks first.

[ZekeTheSneak]

yah i went through siliconed the vac lines to the tb, Im going to dig more because that acctually helped a little. It still cuts out towards 5-6 rpms. Motor just doesnt run very strong off the line

[Sagaris]

My stuttering issues that the car had when I bought it, were fixed by replacing the cap, rotor and plug wires. Checking the plugs and plug gap would be important to do as well, too large of a plug gap will require more energy from the coil to jump the gap and spark and it may not have this energy at lower rpm.

[ZekeTheSneak]

It has new oem plug cap rotor, I will check the gap and change my fuel filter as well. For now my cluster isnt working. More headaches

[quikveedb2]

My stuttering issues that the car had when I bought it, were fixed by replacing the cap, rotor and plug wires. Checking the plugs and plug gap would be important to do as well, too large of a plug gap will require more energy from the coil to jump the gap and spark and it may not have this energy at lower rpm.

same here, coil could be providing a weak spark too if it's going beat

It has new oem plug cap rotor

wat? i'm not sure what a "plug cap rotor" is, do you mean it has new oem plugs, cap, & rotor? just one of those 3? new cap & rotor? i try not to be a grammar nazi since i never capitalize anything, but punctuation is pretty key when you're trying to explain yourself.

[jlevie]

How old are the ignition wires & plugs? If either have significant age on them, replace them. I'd highly recommend finding a shop that can run a smoke test (diagnostic for intake leaks). I'd also recommend that you run the suite of fuel system tests in the Bentley. And if the O2 sensor has 100k on it, replace it. Other faults can cause this, but those are the things to start with.

[ZekeTheSneak]

For being 18 years old I have done a motor swap on a beamer, full suspension and custom coilovers on a datsun 510, repainted a mk3 vr6 myself body work included, full coils and urethane on a mk2 gti and done numerous stereo installs all being flawless yet never once have I checked spark plug gap. Lesson learned. Number 1 was way too big, 2-5 were perfect and 6 was too close. Lesson learned