95 318 surge at full throttle
#1
95 318 surge at full throttle
Okay so i took the truck to go to the store and on my way there i got on it pretty hard. I noticed at full throttle the truck was surging and not gaining rpms after 4000 or so. Then on my way back me and a camaro was playing around and it done it again. So i then stopped and done a burn out. During the burn out the engine had no power and acted like it was going to cut off. So then for the next mile i had to pat the gas to get it home. If i held the throttle steady it would almost die tll i pated the gas again. After getting it home i got brake cleaner and sprayed the intake all around. There was no increase or decrease in idle when spraying the intake. Then i was standing there looking and thinking and heard a pop between firewall and intake and the truck started running finee. So my question is what does it sound like more a fuel problem or vacuum leak? Im up for any suggestions and thanks in advance.
#3
No the CEL never came on. The truck has 141000 miles. When i changed the water pump the front of the motor was covered in a thick coat of black build up. I cleaned it all off and have kept a check on the oil and it hasnt lost any. Only drive the truck at best 30 miles a week. Its more a weekend warrior.and the motor dont look to have ever had anything done to it. OH and when it was acting stupid i did hear it pop back through the intake while getting it home.
#5
Also before all this started then at idle hit or cold the engine lopped like it has a cam and shakes the truck. Could it possibly be a worn timing chain also? The guy i bought it from had just done plugs, wires, cap, and button. Champion plugs btw. What are the common problems for the 5.2? Also has MSD blaster coil.
#6
Today im going to try and check the fuel pressure but my concern is that right now the truck is running ok. So if i check the pressure and its good i really cant rule the fuel system out. But from experience ive never seen a electric fuel pump give a intermittent problem. Either it works or it dont. Also what is the best way to check the vacuum on the entire engine. I have a vacuum gauge tester but its for the old carburetor engine's. Will it work to test the vacuum on a MPI engine. If so where would be the best place to connect it for the testing?