timmy7728

hi first post here i have a 1998 Chevy silverado with 5.7 L trying to chase a problem down. When i accelerate it bogs down but if i floor it it cuts out and bogs down and will catch up to it self at some point. i have done a complete tuneup had a misfire code number 2 cyl looked at spark plug looked good idles good and if i drive normal its fine i just cant floor it. any suggestions would be great.. i was thinking it might be injectors because that's a issue with these




Thanks for any input ..

shamrock246

How many miles on it?could be fuel pump,pressure regulator,spider assy or filter i would start by checking the fuel pressure should be 62-66psi

timmy7728

118000 gut that i got it off of said he did a fuel pump recently but i could check just to be safe i was going to do fuel filter just because its a 11.00 part and i don't know when it was last done

shamrock246

I would start with start with a fuel filter and check the fuel pressure the old spider assemblies do not tolerate low fuel pressure the new style isn't so picky,leave the tester on there for a while and see how many psi you loose over a certain amount of time (key on engine off)

Do you know what make fuel pump he put in? AC/DELCO,BOSCH etc

timmy7728

intake manifold is leaking so i think i found the issue see a little bit of antifreeze

Chevydave86

May also be your cat from the way you explained it if it's not all the way clogged and letting exhaust through a little bit it would be alright on lite to normal acceleration but if you floor it it will just bog down on you. I would take a look at that too

GMcerttech

is it shifting normally or does it rev up before it shifts. it could be your torque converter