The small one without the clamp is the vacuum hose. It *should* just pull off, but they're usually stuck on with heat & age. Begin twisting and it should come off once you get it moving. It's on a smooth steel tube, no barbs or threads, but pushing & twisting seems to work better than pulling.

The big one probably has a spring clamp, where you use a pliers to squeeze the tabs together which loosens the clamp. Kinda like the spring-type radiator hose clamps.

 

What a mess, but things seem OK now. I removed the two bolts and attempted the remove the hoses, but my tools weren't sufficient, so I decided to bolt the FPR back on, and this is where things get messy.

After bolting the FPR back on and starting the car, fuel started gushing out of the FPR, I didn't realize that the o-ring fell off. It was 515PM PST and the shop I normally go to was still closed, but the Open light was on, so I walked in. The manager got a mechanic to remove the hoses and put the new FPR for me, and now the FPR is on and working perfectly.

So far the "Check Engine" light has stayed off, which was displaying the codes P0170 and P0171.

I'll keep this thread up-to-date in-case something changes.

Much regards,

--tj

 

Good post and Great Help from Jim as always..Thank You James

 

The car no longer requires me to "feather" the peddle to get it to accelerate properly, but both codes P170 and P171 are back. Might want to replace the O2 sensors?

--tj

 

P0171 = system too lean
Only the front O2 sensor is involved in that.

Got any ignition misfiring? Misfiring will result in excess unburned fuel and excess un-used oxygen. The excess oxygen is the only thing the O2 sensor can measure.

 

This is before and after a new engine install, and I don't suspect any misfiring.

--tj

 

Well after replacing the FPR, car was still driving funny and codes P0170 and P0171 came back after driving a couple hundred miles. Well, I disconnected the O2 sensor under hood, and now car seems to be driving fine.

So, guess my O2 sensor needs to be replaced? How does disconnecting the O2 sensor affect my car?

Thanks

 

When it's disconnected, control goes into "open-loop" and generally gets richer. So if that improves things, it may be too lean for some strange reason.

Vacuum leak?
TPS needs adjusting?
MAP sensor OK?

 

This is happening before and after engine replacement. Can I check for vacuum leak or will a shop need to check for leak?

Thanks