Hi, I wrote before that my engine is cutting over 6500 rpm. I noticed that when the engine is cold it is almost not cutting and when the engine is after 30 min. of driving the cutting is becoming worst, sometimes the engine is stuck at 6000 rpm and can not go up. I opened the 2 distributors, cleaned them and adjust the gap in the points to 35 mm, I made all kind of changes in the advance ignition (back and forward) and the cutting remain the same. Can it be a fuel pump problem? Maybe plug cables? I will be happy to hear your opinion. Can you tell how to adjust the ignition, is the mark on the flywheel or on the pulley? Thanks, Reuven
This happened to me on my 77 GTB when my battery was nearing the end of its life. How fresh is your battery? Greg
First off, moving the distributors around without a timing light and knowledge of where the marks are is asking for a burned up engine. Technically you could static time the engine and be okay, but only if you knew before hand that the mechanical advance was working reasonably proper. But when you have changes to a car that was previously running well, you should always form a practical method to find the problem. Most ignition troubles are found to be in the secondary, or high tension side. The coil leads to the caps works very hard and will litteraly burn the core out of the wire. The plug wires can and will do the same to a lesser extent. Also, the plug extenders can burn through, the cap itself can carbon track (especially if the car was exposed to wet climate), and the front plug holes can get water logged and cause the same troubles. But quite often most will find the sparkplugs themselves are the culprit, and a new fresh set can cure many ills. And it also the simplest job. Pull the plugs before you start looking anywhere else, and make sure you time the distributors correctly before you drive the car.
Thanks for the answers. Spark plugs are new. I did not find the marks on the flywheel of the ignition so in the end after some moves I returned the to the starting position point. I am not sure 100% that it is an ignition problem (maybe fuel??) and I don't want to start replce part just like this. So, recomendations? Thanks, Reuven
Being a carb car I think it could be fuel delivery. Can you pin it to redline in neutral? If yes, but can't go over 6.5k RPMs on the road, then that's the likely culprit. More likely a clogged fuel line than the pump. If it breaks up both parked and on the road over 6.5k RPMs it's probably electrical. Ken
