i have a lil problem my blazer wont start and has been sitting for a long time but when i spray starter fluid on the tbi it starts perfect and when driving it drives perfect with out the air filter on. once i put the air filter on when the truck is running it dies right away. any suggestions or help will be much appreciated

 

When was the last time the air filter was replaced? How does it look? Do you have proper fuel pressure (9-10psi)?

 

the air filter is like 2 or 3 months old and how do i check for fuel pressure? i had a fuel pump put in like 2 years ago but since then it has been sitting

 

To test fuel pressure on a TBI motor, you need to install a 't' fitting on the feed (larger) line at the back of the TBI unit that will allow you to use a fuel pressure gauge. Most of the >$50 fuel pressure gauge kits comes with the 't' fitting in them or you can buy a fitting and a gauge together for less that you just leave installed.