I have changed the water pump, I beleaive the fuel pump as well. At first my died in middle of intersection, then we noticed it would die when you press the gas, we got him home and now will only stay started for like 5 min still dies out. Any ideas?
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98 and 99 intrepid was manufactured with weak fuel pumps causing them to vapor lock try pouring cool water on the fuel rails on the intake to calm vapored gas then try to start it. Even the temp gauge at half way mark is probably still low on coolant causing engine to be warmer than normal causing the vapor lock to fix this problem replace the fuel pump with a 2000 or newer intrepid fuel pump that carries a little higher psi to prevent vapor lock from reoccurring this pump is compatible with your 98 it will plug right in
This type of vehicles do have the problems you mentioned, CPS, CKP, IAC solenoid, together with the coolant leak on top of engine and the crack of the coolant reservoir tank. I am telling you this as an Intrepid owner.
Check fuel pump pressure, if don't have a gauge, borrow one from AutoZone or similar AutoParts. Also check it when engine don't start. If OK, check for spark, could be camshaft sensor (CPS).
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It sounds (based on your description) like there is a Fuel problem:
1. Check the fuel pressure at the port on the Fuel Rail. Check especially when operating at higher RPM's than at idle or stop. At these levels there is enough gas being provided to keep the engine going. At higher RPM's the Pressure/Volume may not be enough causing the stalling.
2. When was the last time the Fuel Filter was changed? Change this and check operation before moving onto to #3.
3. The Fuel Pump. If the Fuel Pressure and Volume at the Fuel Port is falling at higher RPM's and the Fuel Filter did not help: It sounds like the Fuel Pump is failing. These will fail especially after they warm-up. This problem (losing power and dying) will happen more and more frequently and the Fuel Pump will eventually die all together.
You have to replace the Fuel Filter when you install a new Fuel Pump - it is part of the warranty.
4. The Fuel Injectors: If the Fuel Pressure/Volume at the Fuel Rail is fine, then it is not the Fuel Filter or the Fuel Pump. The problem is "downstream". It may be the electrical aspect of the Fuel Injectors or the mechanical side of the Fuel Injectors themselves. Check each Fuel Injector for correct voltage. If the voltage is correct - Pull and replace that corresponding Fuel Injector. I actually recommend: if you have to replace more that one Fuel Injector - go ahead and replace them all.