fuel pump surging, why?? |
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fuel pump surging, why?? |
Tab914 |
Aug 1 2005, 06:52 PM
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#21
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Member Group: Members Posts: 158 Joined: 25-April 04 From: Alexandria, Ontario, Canada Member No.: 1,978 Region Association: Canada |
Another one for you guys...........
Here is the problem I am trying to fix. Whenever the needle in the temp guage gets to about 1/4 the fuel pump starts surging. This causes the idle to start to go up and down in rythm with the fuel pump. Also when under load the car stutters and shudders and kinda wants to choke. Before the car gets up to that temp. it runs nice and smooth, strong on acceleration and no poping or backfiring on decel or anything. Just sounds great and runs fine. Idle is where it should be and fuel pump does not surge. Here is what has been done. -Valve adjustement -Dwell adjustement -Timing adjustement -Tested MPC as per proper ohms. Parts I have changed- coil, plugs, ignition points, trigger points, condenser, rotor, cap and wires. Questions:- what could make the pump surge like that? -does it make a difference how the MPC wire goes into it's conector? -How do I properly check the head temp sensor. -Could the intake temp. sensor be the cause. I am at a lost. Feel like I am going in circles. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Has anyone had this kind of problem?? Desperate for advice. (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) Thanks, Dominic. forgot to add. car is a 1974 2.0 with stock fuel injection. |
Tab914 |
Aug 1 2005, 08:29 PM
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#22
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Member Group: Members Posts: 158 Joined: 25-April 04 From: Alexandria, Ontario, Canada Member No.: 1,978 Region Association: Canada |
Thanks guys.
The fuel pump is in front with the master cylinder. I will try all those things Mihai. I am posting a pic of something mounted on the front of the engine on the passenger side. I can't find this in the books and have no idea what it is or what it does. If anyone knows I would like to know as well. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif) Dave, the hts is coming in a 170 ohms when hot. Does that pass or is that bad. Here are a couple pics of that thingamajig. The hose conected to it runs down into the engine tin right beside the distributor. The wire coming out the front connects to a green and red wire that goes through a harness and ends up on the corner of the relay board on the rectangle conector. (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) Let me know if you have any ikeas. Dominic. Attached image(s) |
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