hesitation

[truckeronesong]

I have a 99 suburban 4x4 and I get a hesitation at about 1750 or 1800 rpm. I've replaced fuel pump and distributor also mass airflow sensor but still get hesitation any ideas will be appriciated. Thanks.

[maxwedge]

Many things can cause this, o2 sensor, tps skewed, low fuel pressure, a full scan is called for.

[j cAT]

Originally Posted by truckeronesong

I have a 99 suburban 4x4 and I get a hesitation at about 1750 or 1800 rpm. I've replaced fuel pump and distributor also mass airflow sensor but still get hesitation any ideas will be appriciated. Thanks.

if this occurs at the same throttle position it may be the TPS. this can be checked with an ohm meter...

this is a 5.7L V8 ?