1999 Chevy Blazer Turns over doesnt fire

KS6674

MEMBER
1999 CHEVROLET BLAZER
6 CYL
4WD
MANUAL
76,000 MILES

1999 Blazer 4.3L, 5 spd, 4wd. Sat for about 6 months in NY. Had a hole in the gas tank and a broken fuel pump. So 2 weeks or so ago I replaced the tank with a used one and put a brand new Fuel pump in. Blazer turned over and drove fine. It had to sit for a short period of the last 2 weeks or so. Today I climbed in and went to crank it, the battery was almost dead and it would turn over just never fired. I hooked the battery up to my Dakota with jumper cables, So I was definately gettin enough power for crank. However It would just turn over and over never fire. I disconnected the fuel filter and turned the key and had a nice flow of fuel from there. At no point did I ever smell gas under the hood while I was cranking, (and believe me I tried to flood it!) Any one have any ideas before I start tearin **** apart. In the beginning I was thinking Possibly MAP sensor, Is there a distributor on the vortec 6 cyl? EGR, Plugs? Where should I begin? Any answers or ideas would greatly be appreciated! Thanks Kevin!

2 Replies

JDL

MECHANIC
16,098 POSTS

Get the battery charged-up. Then, if you can't check for codes, do some of the basic tests.

Have a helper crank it, while you check for spark at the plugs. You can pull a plug boot, stick a known good plug in the boot, ground metal part of plug to metal part of engine, have helper crank the engine, watch for spark at the tip of the plug. You also use a spark tester, they sell them at the auto stores.

If you have good spark everywhere, check fuel pressure, you need a gage for that. The spider type fuel systems are known for problems, but, no need jumping the gun.