Year: 1993 998cc (1030cc) A+ with HS4 carb
Description of problem:
After the repairs below, the engine will not rev up past 3500 - 4000 RPM regardless of what gear your in.
The car has power below said RPMs, in fact it picks up and drives really nice below 4000 RPM.
The car also starts first thing regarless of how cold or warm it is.
In chit-chat terms:
The "symptoms" present like this: start driving off (as mentioned it feels nice) when aproaching 3500 RPM its feel as so the engine has problems breathing, you can fell and hear the combustion taking place but no power is developed and the car "muffles itself" not reving past that mark.
What has been done:
I had a head gasket fail due to a slight overheating problem. The over overheating was caused by a leak on the water pump which has been corrected.
The head gasket was replaced (with 1 of poor quality - more on this below) and everything assembled. Valve clearances were checked. Ignition timing checked and left at 7deg adv, as it was before. Spark plugs changed, NGKBP6 used. Leads are quite new so only inspected them. Petronix kit is used so no points to adjust. Electronic Coil is used and not suspected since is quite new as well.
After this later problem was developed, i suspected the carburetor, so i took it down and gave it a good clean up. Problem stills the same.
An intake leak was also suspected so i reassembled making sure the LCB and intake manifold are sitting well. Problem continues the same.
Any non-standard parts that might be involved with the problem?
Locally made head gasket.
3-layer gasket, upper and lower layer are copper, middle layer not sure of the material.
Lets just say that this piece couldnt be massively produced due to lack of quality control.
So im out of ideas. I'll appreciate your input.
Thanks in advance.
