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Home >> Cadillac >> 1988 >> Cimarron Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Multi-Port >> Trouble Shooting >> Symptoms >> Hard Start

Hard Start

  1. If engine starts but then dies immediately, see appropriate ENGINE CRANKS BUT WILL NOT RUN diagnostic chart in COMPUTERIZED ENGINE CONTROL section. Check for sticking or binding TPS.
  2. Check for high TPS voltage with throttle closed. Voltage should be less than .7 volts. Check for high resistance in coolant sensor circuit or coolant sensor.
  3. Check fuel pressure and fuel pump relay. See appropriate A-7 FUEL SYSTEM DIAGNOSIS CHART in COMPUTER CONTROLS section. Check for contaminated fuel. Check in-tank fuel pump check valve operation.
  4. If problem exists in cold weather only, check cold start valve operation. Check fuel evaporation system. Check EGR operation. Check ignition system.
  5. Check spark plug condition. On 2.8L VIN S, 5.0L and 5.7L, if engine starts and immediately stalls, disconnect distributor by-pass line. If engine starts and runs okay, replace pick-up coil. If engine starts and then stalls, disconnect MAF sensor (if equipped). Replace MAF sensor if engine runs and sensor connections are okay.
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