St-St-Stuttering Down the Road
- plugs replaced with Champion Single Platinum
- more plugs with Bosch Platinum 4+
- plugs again with SplitFire brand
- coil wire
- distributor cap
- rotor
- ignition module
- ignition coil
- fuel pump
- PCV hose
- MAP sensor
- checked fuel pressure
The problem improved sometimes when he made repairs such as the distributor cap and rotor, but it never lasted.
A: Gene, you've spent a lot of time and some money trying to fix your stumble. Have you thought about getting your car a little-old-lady walker? But seriously, there are some things you may have overlooked. The most obvious to me would be your car's On Board Diagnostic (OBD) system. Have you had the codes pulled from your engine? It's free at any AutoZone. This information can be hugely valuable to you. Chances are your engine's computers have been telling you what the problem is all along.
There are a couple of things that you haven't replaced or checked that could be causing the problem, but without translating the OBD codes first, it would be a craps shoot that could cost you more money. I wouldn't touch anything else until I had the codes checked. Once you get the codes, you can use our OBD Code Database to see what they mean, and then you can make an informed repair!
Comments
You are an idiot. The one thing he didn’t do and should anyways is put on a brand new set of good quality wires. They are most proabably arcing out under load and dropping a gear will help. You never offered him what promised to be another piece of advice but ended up talking OBD again.
Spark plug wires sound like a good explaination, but I’d also try the fuel filter. Now I know you said the fuel pressure was okay, but that’s probably with a light load. When you step on it, the demand goes up significantly and there may be some restriction there.
First of all, this is a 1994 vehicle which is has very limited OBD diags. Since there was no “service engine” light on then no OBD data is available. There is a pickup coil in that distributor that causes this problem. Should also run AC Delco plugs…
I have never seen a Champion plug perform well (oscilloscope) on anything but a Dodge. They run well in small engines also. I have seen plugs that were bad because they fired under normal conditions but not under load. Put AC or Autolite in it.
There is allot of information available through the OBD on a 94 vehicle, I use a paper clip to access mine. The problem sounds fuel related to me, I would suspect the oxygen sensor.
Autozone only checks for OBD11 code this car being a 91 is OBD1 and they do not check code for this car
hello,
anybody know i to locate the pcv in toyota avalon.
thanks