My 97 Blazer is really hard to start cold...

[danielsatur]

Unmeterd Air is sneaking into your Inake, this will confuse your ECU, PCU, and throw codes.

Visual Inspect -
1) Check plastic, rubber, seals, and gaskets on your PCV, and EGR systems.
2) Check your Air box , and Air duck going to your Intake.
3) Caution -Technicians use a spray break cleaner to check for unmetered air leaks while the engine is running.

All Air is metered going into the engine, the PCU will control the Air/fuel mix.
The MAF sensor sends a signal to the PCU, on how much air is being used ? ,the Upsteam O2 sensor tells the PCU, how well it's being burned.

A bad Massive Air Flow (MAF) sensor will cause a cold hard start.

See http://www.automotiveforums.com/vbul...d.php?t=768631

[MissMikel]

Originally Posted by danielsatur

Unmeterd Air is sneaking into your Inake, this will confuse your ECU, PCU, and throw codes.

Visual Inspect -
1) Check plastic, rubber, seals, and gaskets on your PCV, and EGR systems.
2) Check your Air box , and Air duck going to your Intake.
3) Caution -Technicians use a spray break cleaner to check for unmetered air leaks while the engine is running.

All Air is metered going into the engine, the PCU will control the Air/fuel mix.
The MAF sensor sends a signal to the PCU, on how much air is being used ? ,the Upsteam O2 sensor tells the PCU, how well it's being burned.

A bad Massive Air Flow (MAF) sensor will cause a cold hard start.

See http://www.automotiveforums.com/vbul...d.php?t=768631

Yes I know...But I have very low fuel pressure soooo...that points to my pump No??

[MT-2500]

Originally Posted by MissMikel

Ok we are in the process, right now as I write this, of replacing the fuel pump..when we check the voltage going to the pump it said we are only getting 5 volts...Is that right??? or is there possibly something else going on?? My relays are working I think...what else should we check??

Please Please help....

Was you testing it at the gray wire fuel pump feed?

It should have 12 volts to fuel fump.

[MissMikel]

Woot!!! It started!!! It started!!!!! Thank you soooo soooo much!!!