Chevrolet Blazer requires ether to start despite good fuel pressure and recent fuel pump and spider replacement on Chevrolet Blazer

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Blazer owners report experiencing difficulties starting their vehicle even with good fuel pressure and recent replacements of the fuel pump and spider. These issues may be attributed to a faulty mass airflow sensor, which can disrupt the air/fuel mixture necessary for proper engine startup. Additionally, some owners have encountered problems with clogged fuel injectors that hinder fuel delivery, despite the presence of adequate fuel pressure. Even with a new fuel pump, there may be concerns regarding its functionality, such as inadequate fuel delivery or inconsistent pressure, leading to starting challenges. Ignition issues, including problems with spark plugs, wires, or the ignition system, can also prevent the engine from starting properly. Furthermore, a malfunctioning fuel filter may restrict fuel flow, contributing to the starting difficulties. Lastly, low fuel pressure, even if it appears technically acceptable, can still affect the engine's ability to start smoothly. It is recommended for owners experiencing these issues to investigate these potential causes further to resolve the starting problems effectively.

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