Ray -
I posted this to the thread, but am sending the text directly to to to ensure you see it. Thnks.
Ray -
Thx for your insight. Below are my responses to your comments.
The hesitation occurs in park and in gear. The motor will not hold any rpm above, or slightly above, idle. I inspected the duct work between the AFM and throttle body, and see/hear no leaks. Also, the vac gauge is rock steady at 22" at idle. I don't think my problem is a vac leak, or I'd see some movement on the vac gauge, or a lower reading at idle. I will check the vac gauge, when opening the throttle. The engine does not rev, so this test probably won't help. I will test the EGR w/ my Mighty Vac. Thx for that idea. I think it is a good idea (better MPG's)
to replace the O2 sensor given that it is the original part that is 23 years old w/ 154k miles. My replacement parts are all aftermarket. I don't think the problem is ignition related replace parts (cap, rotor, wires & plugs). My feeling is that it is air/fuel delivery related, or an exhaust restriction. If the EGR checks
out OK, I will disconnect the exhaust pipe at the exhaust manifold to confirm/rule out an exhaust restriction. Maybe my aftermkt fuel filter I installed is bad, but highly unlikely. I will also hook up my fuel pressure gauge. My elec fuel pump is noisy. Is this normal for this car, or maybe an indicator that it's going bad??? I'd also like to test the AFM
voltage as you recommend. I just bought a Chilton's book for this car on eBay. I hope this procedure is in the book. I'll also add some injector cleaner to the gas tank.
- Glenn