78 351M having issues starting
#1
78 351M having issues starting
Hello, first post on here,
i have been having issues with getting my truck started, it just keeps cranking and slows down the longer i keep cranking it. At this point im afraid that im going ot wear out my starter, i have been advised to replace my battery and my starter solenoid. I have already checked all conections and cleaned off the ones that needed it, but still just slow cranking. also, the starter is only a year old. any ideas or tips?
thanks
max
i have been having issues with getting my truck started, it just keeps cranking and slows down the longer i keep cranking it. At this point im afraid that im going ot wear out my starter, i have been advised to replace my battery and my starter solenoid. I have already checked all conections and cleaned off the ones that needed it, but still just slow cranking. also, the starter is only a year old. any ideas or tips?
thanks
max
#2
Welcome to FTE.
If the starter turns and engages and turns the engine, you do not need a solenoid. The solenoid is working.
If the starter turns and engages and turns the engine, you probably do not need a starter. Sometimes, they will turn slow because they are worn or will not turn at all, nearly shorting out, heating up the leads, making smoke etc.
Your battery is turning over the engine, maybe it's low.
But WHY doesn't your engine start? Was there recent work done on it? Timing changed? That will fubar the starting and make it turn slow as well.
If the starter turns and engages and turns the engine, you do not need a solenoid. The solenoid is working.
If the starter turns and engages and turns the engine, you probably do not need a starter. Sometimes, they will turn slow because they are worn or will not turn at all, nearly shorting out, heating up the leads, making smoke etc.
Your battery is turning over the engine, maybe it's low.
But WHY doesn't your engine start? Was there recent work done on it? Timing changed? That will fubar the starting and make it turn slow as well.
#3
#5
Hmm potentially your fuel pump could be going bad. When it's driving, have you tried running it hard? As in giving it a lot of gas, or going up steep hills etc.
If it seems to struggle in these areas, it could be the fuel pump going out. If you are getting spark at the wires and the timing is correct, I would suspect a fuel issue.
I don't know what the fuel pressure should be on a carberated Bronco, nor do I know if they have a valve to hook up a fuel pressure gauge on the fuel rail. If there is a screw on valve on the fuel rail, it would be a good idea to get a cheap fuel pressure gauge and test the fuel pressure.
In the meantime, if the fuel filter has not been changed during the tune up, or for a long time, it would be a good idea to change that also.
If it seems to struggle in these areas, it could be the fuel pump going out. If you are getting spark at the wires and the timing is correct, I would suspect a fuel issue.
I don't know what the fuel pressure should be on a carberated Bronco, nor do I know if they have a valve to hook up a fuel pressure gauge on the fuel rail. If there is a screw on valve on the fuel rail, it would be a good idea to get a cheap fuel pressure gauge and test the fuel pressure.
In the meantime, if the fuel filter has not been changed during the tune up, or for a long time, it would be a good idea to change that also.
#6
i am getting plenty of gas, but i will look into it, my filters are brand new and full and the pump is about a year and a half old. it feels as if it doesnt have enough power to fully turn over, (while cranking it doesnt even try to fire for about a minuet or so, sometimes longer) and when it does it tends to sputter a bit, then runs just fine after that, i havent noticed any loss of power though.
Thread
Thread Starter
Forum
Replies
Last Post
damiunwalker
1973 - 1979 F-100 & Larger F-Series Trucks
3
07-07-2019 05:58 PM
Tyler S
1948 - 1956 F1, F100 & Larger F-Series Trucks
27
06-19-2015 09:09 AM
Stonesetter1
1987 - 1996 F150 & Larger F-Series Trucks
3
05-29-2015 02:31 PM
El Padrino
1973 - 1979 F-100 & Larger F-Series Trucks
17
03-09-2013 08:25 PM