1994 GMC Sierra "air pump" Questions

...air pump question i have a 1990 gmc with 5.7l engine. i want to know how important the air pump is because i want to put headers on my truck. well the air pump is used to reduce emmissions it sends ...

pump working and feel some air being blown out - yes there is fuel in the tank. Do you think its the pump? yes it is probably the pump or a problem in one of the fuel lines but i would bet more on the

...air. For each wheel, have someone pump the brake pedal and hold it as you loosen the bleeder. Their foot should ride the pedal down and NOT lift up their foot until you have tightened the bleeder ...

...pump the fluid directly back into itself. The idea is that you do not let the master cylinder pull any air back into itself, from the line inlet. So, as the cylinder pumps out the air, the only thing ...

air out after filling the pump with power steering fluid by turning the engine on, rev it up to about 1500 rpm's, and turn the wheel left but not to stopping point and right but not to stopping point.

need a helper fill up brake fluid have someone to pump up brakes hold down pedle brake lose the bleeder on the caliper let the air out tigten it re pump re repeat until no air keep an eye on the fluid

...on the engine. could be a problem with the pump as only supposed to drop rpms by a 0.5%to 1% or you have a dirty idler and its not able to get enough air on idle, could even be a blocking air

running new pump for close to an hour . Does this new pump need to bleed out yet .. ??? Well you may have turned the fluid into foam.Let it sit and let all the air settle out of the fluid and then try

o Did you do a tune up on the vechicle? Does it sound like it wants to start? It could be the spark plugs. check pump, use a air hose to build presure in fuel tank to check pump, it cranks it the pump

...air sensor or fuel pump, however fuel pump definately spins. Any ideas? starting definately has a lot to do with the crank/cam position sensors, but it wouldnt have nothing to do with hot or cold ...