New problem

**speedracer25f** · 08-05-2008, 12:06 PM

Ok, I was driving the car today. Went a few places, was out in the heat for a few hours with the AC on, on my last run home the engine started to fluctuate on the highway. When I got off the highway it stalled. I got it running and it was barely idling. I managed to drive it by keeping the RPM's up. I got it to my friends garage and we found it was losing fuel pressure but the fuel was coming out super HOT. Actually made the gauge to hot to hold. We let the car cool down for an hour and it fired up and ran fine. Any ideas anyone?

**ASC420** · 08-05-2008, 12:42 PM

Try checking the EGR valve....i had a cadillac that started running the exact way you described, almost as if it was flooding out. We took out the EGR and sprayed it out and cleaned all the carbon build up off and put it back in. I ran like a dream after that

I say take it out and take a look at it...thats my guess

**speedracer25f** · 08-05-2008, 01:06 PM

I did the EGR and AIR tube deletes awhile ago.

**LS1buckey** · 08-05-2008, 02:44 PM

if you have low fuel pressure I would look for clogs in the fuel lines, filter, and make sure the fuel pump is working right. Not sure why the fuel is so hot only thing I can think is because the fuel is taking longer to reach the valve where you check it it has more time to heat up in the engine.

**speedracer25f** · 08-06-2008, 04:42 AM

Im sure its not a clog because once I left it cool off it held a steady 55 lbs. Its almost like the fuel boiled in the tank.

**ASC420** · 08-06-2008, 04:25 PM

You didnt put mid grade or regular unleaded in your tank did you?

**speedracer25f** · 08-07-2008, 08:00 AM

My car only gets 93 sunoco. Unless the gas station ripped me.

**2001NBMZ28** · 08-07-2008, 08:42 AM

Did he scan it for any codes? Some won't illuminate the MIL until they see something two or three times.

**Orcus79** · 08-07-2008, 08:57 AM

fuel grade won't effect vapor lock, which is pretty well what is happening. Clogged fuel lines can be tricky. If the filter is clogged and the fuel's hot that can lead to all sorts of issues. When was it changed last?

I've seen it happen many time on carb vehicles where there will be a partial blockage and car will run great till it warms then dies when the fuel stops. Let it sit a bit and low and behold it will run till it happens again.

**speedracer25f** · 08-07-2008, 09:28 AM

There were no codes pending, and did the fuel filter 6 months ago, did the fuel pump 6 months ago and the tank was spotless.

**Orcus79** · 08-07-2008, 09:33 AM

I have no real ideas then. only other thing I can think of is that either the fuel pump got hot, or the exhaust is bit too close to a fuel line. Are the fuellines in the engine bay still wraped in the heat shield foil?