My 95 has an intermittent problem. It will crank fine, just not start. Fuel pressure is okay (about 45 psi) and I have a spark. Put a new coil in just for fun, still didn’t start. As it cranks it occasionally tries to start. After I crank repeatedly and for a very very long time, it will start, run rough for about 30 seconds and then run fine. Everything will be fine for about 3 months. Then it doesn’t start again. And I go through the same routine. Acts like my cars that had carburetors did when they were flooded. Any ideas?

One added symptom. Before it doesn’t start at all, it seams to progressively take a little longer to start each time. Not so much that it’s a problem, but each time I start it, it will take maybe an extra second to start. And the bang, it doesn’t start at all.

 

if it's acting like it's flooded, try the coolant temp sensor on the water pump. When they fail, they cause the computer to give a "Cold Start" scenario, excess & unneeded fuel(ergo the flooding symptom). The intermittant issue could be a faulty connection at the pigtail or in the sensor. Just a thought from what you've given me.

 

Have you tried to pull the vac. line off the fuel pressure regulator. If it is wet, you should replace it. Most times it'll crank till it "clears" out. Easy test that would only take 1 minute to do. No fuel is good, if fuel is present most likely the diaphram is torn and the whole regulator should be replaced.

 

No fuel in vac. line off pressure regulator. I checked fuel pressure drop. Here's the data: Key on to pressurize system. Key off. Pressure 43 psi. Then at 2 minutes, 42. At 4 min. 40. At 6 min. 39. At 8 min. 38. At 10 min. 37. At 12 min. 35. At 15 min. 35. At 20 min. 30. At 30 min. 26. At 40 min. 24. At 50 min. 21. At 60 min. 20. At 90 min. still 20. At 110 min. 16. At 120 min. 15.
Is this normal?

 

thats pretty normal. mine bleeds off immediatly, but its a aeromotive.. stock should hold about how yours does