Hey guys i'm having an issue with my 87 z28 5 speed. The car normally runs fine but when I was driving this morning and I really gave it some gas the I noticed that the car was hesitating and bogging down. I had been driving the car for about 5 minutes so the car was somewhat warmed up. I just recently replaced the fuel filter and I am wondering what is causing this issue. Thanks in advance.

 

vacuum leak/bad gas/sensor problem/timing off, dunno...........was it doing this before you changed the fuel filter?

 

This happened after I replaced the fuel filter and I do not have any vacuum leaks.

 

If this a happened AFTER you changed the fuel filter make sure it’s tight and not sucking in air

 

Check fuel pressure to make sure it is within spec. Maybe the fuel pump is getting weak. If possible test while driving with a helper to see what happens under load.

 

The car is only bogging down when accelerating when I first get in the car but the issue goes away after driving for about 15 minutes

 

Use an ohm meter to check your coolant temp sensor. 2 pin sensor in the front of the intake manifold.

Then compare your reading to this chart

 

Tape a fuel pressure gauge to your windshield and try to reproduce the issue.

 

this. fuel pressure would be the first thing I would checkhere. Its easy to do and if you don't have the gauge they are 35$ on amazon for a quality Bosch kit (example of the one I have)
Only hard part is viewing it while driving... tape works here as Komet said.

 

thanks for the info guys

 

Boy, if it was me, and all I did to the car. ALL I DID, was change the fuel filter, then the fuel filter sure would be prime suspect #1.

 

Agreed, I'd also be having a second look at the last changed item.

 

Check your fuel return lines. The increase in fuel flow from a brand new filter will often dislodge a piece of debris down the line and if it doesn't hit an injector, or make it safely to the tank, then it could cause problems with fuel return.