vroom ZOOM
Chief Petty Officer
- Joined
- Aug 15, 2017
- Messages
- 427
Hello
Working on this interesting case of a motor. When I started messing with it, the front timing cover was removed, the cylinder heads looked unpainted and had adjustable rockers in them, and the intake manifold had a couple of new bolts. Additionally there where new manifolds and elbows on the motor, which can only mean to me that someone was doing a major repair on this engine. Why the timing cover was off is beyond me, I checked the timing marks and all was good. It took me about a day to get the timing cover and damper back on. I put the rest of the accessories on, dumped out the fuel filter, and checked the compression on a couple of cylinders before trying to start it. Compression was around 160 on the couple of cylinders I checked. The fuel filter was full of old orange gas, but no water. I hooked up a remote tank with fresh fuel and primed it. The gauge showed 43 psi at the rail so I cranked it up. It fired up immediately, sounding completely normal, but after starting, instead of settling down to idle it just stalled out. Fuel pressure stayed at 43 psi. I tried starting it a few more times, and each time it would start right up with one touch of the key and then stall out. After that I tried giving it some throttle and it would rev right up just fine, I could keep it running with short blips of throttle, but as soon as I return it to idle it would just stall out. Fuel pressure is still normal all this time. I hooked up the laptop and there are no codes, MAP sensor reads normally.
So far, these are all classic dead IAC symptoms. So I pulled the IAC out and turned the key. To my dismay, it appeared to move normally. And this is where I ran out of ideas. All the exhaust runners are warm, therefore it is firing on all cylinders. I pulled the injectors to have them flow tested, but am doubting that is my issue. Any ideas are welcome.
Working on this interesting case of a motor. When I started messing with it, the front timing cover was removed, the cylinder heads looked unpainted and had adjustable rockers in them, and the intake manifold had a couple of new bolts. Additionally there where new manifolds and elbows on the motor, which can only mean to me that someone was doing a major repair on this engine. Why the timing cover was off is beyond me, I checked the timing marks and all was good. It took me about a day to get the timing cover and damper back on. I put the rest of the accessories on, dumped out the fuel filter, and checked the compression on a couple of cylinders before trying to start it. Compression was around 160 on the couple of cylinders I checked. The fuel filter was full of old orange gas, but no water. I hooked up a remote tank with fresh fuel and primed it. The gauge showed 43 psi at the rail so I cranked it up. It fired up immediately, sounding completely normal, but after starting, instead of settling down to idle it just stalled out. Fuel pressure stayed at 43 psi. I tried starting it a few more times, and each time it would start right up with one touch of the key and then stall out. After that I tried giving it some throttle and it would rev right up just fine, I could keep it running with short blips of throttle, but as soon as I return it to idle it would just stall out. Fuel pressure is still normal all this time. I hooked up the laptop and there are no codes, MAP sensor reads normally.
So far, these are all classic dead IAC symptoms. So I pulled the IAC out and turned the key. To my dismay, it appeared to move normally. And this is where I ran out of ideas. All the exhaust runners are warm, therefore it is firing on all cylinders. I pulled the injectors to have them flow tested, but am doubting that is my issue. Any ideas are welcome.
