1ST GN 1987 NO BOOST AND BACKFIREING

[Phoneguy]

Check the vacumn line to the fuel regulator, its hard to believe you blew a headgasket at 5 psi.

Re read what he wrote...it will only go to 5 psi now...

Bryan

 

[karst#9]

Re read what he wrote...it will only go to 5 psi now...

Bryan

Probally vacumn line on the regulator, or vacumn issues thats why it wont go over 5 psi.

 

[RUDE DOG]

JUST GOT 1 GN HAD IT OUT JUST PLAYING AND LEARNING THE CAR DID A COULPE BURN OUT AND NOW WHEN I BREAK TORK IT IT MIGHT GET TO 5 LBS THE IT START PUTTIN AND BACKFIRING AND WONT GO GOOD I HEAR A LOUD SUCKING SOUND NEED HELP.

The sucking sound was probably from a vacuum leak somewhere, look for any disconnected or broke vacuum hoses.

 

[nash421]

Would look for a vacuum leak somewhere 1st. then check fool pressure and afr. then check compression and leak down test to check head gaskets. Good luck

 

[riviera]

I look for broken vacum line nothing but I was geting gas out the fuel pressure regulator vacum port is this normal also is the driver side head gasket always the 1 that go bad

 

[riviera]

I look for broken vacum line nothing but I was geting gas out the fuel pressure regulator vacum port is this normal also is the driver side head gasket always the 1 that go bad

 

[salvageV6]

No and no.

It sounds like the diaphragm inside the regulator is leaking, only vacuum should be at that top port.

 

[GullsGN]

Check the vacumn line to the fuel regulator, its hard to believe you blew a headgasket at 5 psi.

Nope. He said he can only get to 5lbs before it starts backfiring, AFTER he played with it doing burnouts. Not knowing these cars + doing burnouts = headgaskets going POOF!

 

[RUDE DOG]

I look for broken vacum line nothing but I was geting gas out the fuel pressure regulator vacum port is this normal also is the driver side head gasket always the 1 that go bad

Get that regulator replaced

 

[karst#9]

Nope. He said he can only get to 5lbs before it starts backfiring, AFTER he played with it doing burnouts. Not knowing these cars + doing burnouts = headgaskets going POOF!

Ive had a blowed head gasket that with 20+ psi never backfired, but had a dead miss in it, also never heard of a blowed head gasket making a hissing sound. I think he found the problem with the regulator, but i might not know these cars

 

[groumoutis]

If it was me I would spend the extra money to get an adjustable fuel pressure regulator. Oh and before you ask set it at 43psi with the vac line off.

 

[klmnla]

The sucking sound is all of your money and spare time being pulled out.