Besides those usually associated with other or later model cars? I ask because the manifold nor temp seem to increase, nor do I have decrease in mileage But the car is sluggish on the throttle, I know the AT is a slug, but the car was much more responsive in the very beginning, even with bad sensors, few codes.
All sensors have been replaced, new coil, wires plugs etc. Car idles like a top, good mileage 27-30, no codes, no stuttering, odd idle etc. I do smell the telltale sign ever so often, not heavy, but comes and goes. It just feels like an anchor is attached to it at time. No parking brake for now, new brakes and lines, calipers aren't dragging, new bearings etc.
I do plan to swap to Magnaflow cat and muffler with custom mandrel SS pipe very soon as I am restoring the car, want it breathing better and looking nicer.
pound on the cat (with your hand) and see if it sounds like sand in there. They used pellets and if they are still moving around, the cat may still be OK. Hard to say without some tools to test for backpressure. If your MPG is good and such, it is probably ok, but it is old and changing it out will be a good thing.
[This message has been edited by jaskispyder (edited 10-28-2014).]
Remove the O2 sensor. The car can start without it. Attach a common compression gauge. It will thread in to the Oxygen sensor hole. Start the engine, rev it and watch the gauge. Anymore than a pound of back pressure is an indicator of a plugged exhaust/CAT.
Remove the O2 sensor. The car can start without it. Attach a common compression gauge. It will thread in to the Oxygen sensor hole. Start the engine, rev it and watch the gauge. Anymore than a pound of back pressure is an indicator of a plugged exhaust/CAT.
Remove the O2 sensor. The car can start without it. Attach a common compression gauge. It will thread in to the Oxygen sensor hole. Start the engine, rev it and watch the gauge. Anymore than a pound of back pressure is an indicator of a plugged exhaust/CAT.
Agreed. This is probably the best way to check for clogged cat. But, If you don't have a compression gauge and you do have a vacuum gauge, you can connect it to a good vacuum source, slowly increase the rpms to 2500 -3000 and watch the gauge. If the vacuum reading decreases as the rpm increases you may have a plugged cat.
Excellent suggestions! But may be replacing sooner, got pulled over this morning for my antique tag. lol So I will have to go through emissions for a regular tag. Fingers crossed since all my sensors are new.....
Also forgot to mention I checked fuel pressure at idle and under load a few months back. In regards to sluggish throttle. Hopefully, it will pass tomorrow, get new cat next week, see if that wakes it up.
[This message has been edited by mckaymotoworks (edited 10-29-2014).]
Passed emissions with flying colors. So maybe the transmission, though a slug by nature, is at fault. I will look at adjusting the shift and throttle sync, but other than that, no use since the 4 speed will be going in.
Passed emissions with flying colors. So maybe the transmission, though a slug by nature, is at fault. I will look at adjusting the shift and throttle sync, but other than that, no use since the 4 speed will be going in.
Auto tranny? Yeah..... slow... very slow
Just put the 4speed in there... things should get better.
Just put the 4speed in there... things should get better.
I totally agree. But I am not crazy,lol, it did accelerate better at one point. As said, won't waste much time chasing it since swap is pending I have to get my 86' CRX Si back up so I can get to work on the Fiero.
Equipment gets old and plugged up. Dauh. Hyperformanceliw cats have been kicking but for many years. There is a couple old clowns who disagree but thankfully they are minority. Cats come in high flow configurations and will kick but on straight open pipies. I love wbay my Magna flow mufflers do and my cats yeeowl.
