Warm running problems are affected by valve timing, spur belt tension, cold start advance, injection pump timing, idle RPM and maximum RPM. Therefore all of these items should be checked to assure that all factors that could affect vehicle performance are adjusted properly.

• Check for revised parts: Crankshaft bolt modification on 1.5L engines, air filter hose
• Check valve clearance
• Check compression
• Check for air leaks
• Check for fuel leaks
• Perform idle speed drop test
• Check injectors
• Check / adjust valve timing
• Check / adjust cold start advance
• Check / adjust injection pump timing
• Check / adjust idle and maximum speed
• Check pump mounting brackets