turboki
Member
- Joined
- December 9, 2013
- Messages
- 15
- Reaction score
- 0
- City, State
- San Diego, CA
- Year, Model & Trim Level
- 1992 Ford Explorer XLT
Hey guys,
long time lurker first time poster here. I've got a 92 XLT that I built into an overlanding truck and started my Pan-America Highway trip. Well, pretty soon into the trip I started getting pinging going uphill. 91 gas helped, but it was there the whole time. By the time I got to Northern Canada, a weird thing started happening. The truck would throw a CEL but the pinging would completely stop. As soon as I would turn the truck off the CEL would clear itself and the pinging would start. Well I was in the middle of nowhere and had no reader at hand so I couldn't see what was happening, but I kept it full of 91 and drove it back to San Diego without too many issues.
Since I've been back I've tried everything I found on these forums. SeaFoam treatment, cleaned MAF, replaced Manifold Temp and O2 sensors, checked for vacuum leaks, replaced the PCV valve and replaced the head gaskets (had some unrelated oil/coolant leakage, so I know the lower intake is tight to spec. I also replaced the coil pack, the wires and plugs as well as the fuel pump. I checked out the injectors and they looked clean, but just as a precaution I ran some cleaner through the system for a few days. I also got my hands on a SnapOn diagnostic tool which shows everything in the truck to be honky dory. Yet the damn thing wont stop pinging when I'm going uphill. Now I even removed the Octane Short Bar that prevents the timing from advancing allowing you to run **** gas without pinging, but it's still pinging on big hills. The rest of the time it drives strong, idles perfect, has no issues. The noise it makes when going up hills is like 2 spoons clicking against each other, but not consistently. Its more like change in the dryer.
I really don't know what else it could be. The only thing I can think of doing is a full rebuild on the whole block, but I really really don't wanna invest that kind of money into it at this point.
Can you guys think of anything else it could be?
Also, the 92 does not have EGR or a BARO sensor so these are not the cause.
long time lurker first time poster here. I've got a 92 XLT that I built into an overlanding truck and started my Pan-America Highway trip. Well, pretty soon into the trip I started getting pinging going uphill. 91 gas helped, but it was there the whole time. By the time I got to Northern Canada, a weird thing started happening. The truck would throw a CEL but the pinging would completely stop. As soon as I would turn the truck off the CEL would clear itself and the pinging would start. Well I was in the middle of nowhere and had no reader at hand so I couldn't see what was happening, but I kept it full of 91 and drove it back to San Diego without too many issues.
Since I've been back I've tried everything I found on these forums. SeaFoam treatment, cleaned MAF, replaced Manifold Temp and O2 sensors, checked for vacuum leaks, replaced the PCV valve and replaced the head gaskets (had some unrelated oil/coolant leakage, so I know the lower intake is tight to spec. I also replaced the coil pack, the wires and plugs as well as the fuel pump. I checked out the injectors and they looked clean, but just as a precaution I ran some cleaner through the system for a few days. I also got my hands on a SnapOn diagnostic tool which shows everything in the truck to be honky dory. Yet the damn thing wont stop pinging when I'm going uphill. Now I even removed the Octane Short Bar that prevents the timing from advancing allowing you to run **** gas without pinging, but it's still pinging on big hills. The rest of the time it drives strong, idles perfect, has no issues. The noise it makes when going up hills is like 2 spoons clicking against each other, but not consistently. Its more like change in the dryer.
I really don't know what else it could be. The only thing I can think of doing is a full rebuild on the whole block, but I really really don't wanna invest that kind of money into it at this point.
Can you guys think of anything else it could be?
Also, the 92 does not have EGR or a BARO sensor so these are not the cause.