Help/advice needed!!
#1
Arggh [img]core/images/smilies/mad.png[/img]
After getting the mach1 back on the road after sitting for a good few years, with the occasional start up, every thing was good, running well, idling good, good vacuum. Drove last Saturday to Mill Hill, then on to Borehamwood, then home, no problems. Put £25 petrol in on way home, Sunday morning, tank was empty!! Anyway, saw it was dripping from petrol pump, so ordered a new pump and knowing the oil could be contaminated with fuel new oil and filter. Pump fitted yesterday along with oil/filter change and a can of fresh petrol. Go to take it to the petrol station today to fill up, start it up and I got smoke billowing out of the exhausts [img]core/images/smilies/frown.png[/img] !! And I mean billowing!! Also running very rough, kept cutting out, only managed to keep it running with full choke, which it rarely needs usually. Also a mighty backfire at one point!  Only difference is I went from using the Valvoline VR1 20w-50 oil to a cheaper 15w-40 oil, and the new Carter fuel pump? What the f*** has happened! Smoke colour is dark, but not black, but not bluey grey either! Doesn't smell too petrolly either. Used some sea foam a few weeks ago, seemed to run slightly better afterwards, so this is purely a problem since the fuel pump/oil change yesterday.
Could the slightly thinner oil be getting in somewhere it shouldn't?
I'm guessing while the petrol pump was leaking, it was not delivering full pressure, so now it is could it be flooding the carb?
Any advice on where to start will be greatly appreciated! [img]core/images/smilies/biggrin.png[/img]
Reply
#2
Ok I'll take a stab at it. After setting so long, there is quite often a lot of sediment, crud, and varnish from old fuel in the gas tank. When you bring one back from the dead, it's not uncommon for the fresh fuel and "Sea Foam" to loosen all the crud in the tank, and it Immediately heads for the fuel filter, which plugs up almost instantly, especially if you have the filter that screws into the front of the carb. It's possible some of the crud got past the filter, and has plugged the Idle circuits in the carb, as noted by needing full choke to keep running. The main circuits are larger, and less prone to plugging. The 15 / 40 oil shouldn't be an issue. 

I think I would pull the filler neck out of the tank this can be done in the trunk. Take a "flashlight" No Open Flame! and a mirror, and look into the tank, and see how clean it is or isn't??? Pull the carb, and clean it. You may even need to sonic clean the carb, as I'm told this does an amazing job on carbs. Blow out all the fuel lines, and see if you get a bunch of crud? After everything is clean. I'd put a clear see through fuel filter in the line to the carb, you can buy a fitting at the parts store to replace the stock fuel filter. Then give it a go and see what you get.  Thumbup  Hope it helps. 


JTS
Reply
#3
Thanks for the reply, really detailed, but, I've been thinking, and could I have put a can of diesel in........it was late and I was looking forward to getting home after a long day?
Reply
#4
Good advice from JTS. Diesel could be the problem. You should be able to smell the difference from petrol and diesel at the gas filler. Good luck.
Reply
#5
Yes, Diesel would definitely do what you are describing. I worked for A John Deere dealer with 2 Identical Chevy service trucks. One Gas, and One Diesel, and several times I had to drain the diesel out of the Gas one, and the gas out of the diesel one. We had our own fuel pumps, and both nozzles were the same size. We put a DIESEL sticker on the side of the diesel truck near the fuel door which helped. But it still happened occasionally. Sounds like you're on to something. Let us know how it goes. 

JTS
Reply
#6
Yeah, what an ass I feel!!! Never done that before in 42 years of driving!! Feel free to ridicule me Cool
Smelt and felt like diesel, so just spent the morning draining as much of the system as possible, luckily I had only put 5 litres in, and it still had a little petrol in as well. Will use some sea foam when I refill, hopefully it will help clean the remaining diesel out!
Reply
#7
(05-02-2022, 09:30 PM)mach71 Wrote: Yeah, what an ass I feel!!! Never done that before in 42 years of driving!! Feel free to ridicule me Cool
Smelt and felt like diesel, so just spent the morning draining as much of the system as possible, luckily I had only put 5 litres in, and it still had a little petrol in as well. Will use some sea foam when I refill, hopefully it will help clean the remaining diesel out!

Don't feel too bad, it happens. I did something similar to my boat. The gas filler and the fresh water filler screw-on caps look identical unless you look at the small symbol on the cap. Although they are on opposite sides of the boat, I absent mindedly added fuel stabilizer to the fresh water tank! Fortunately I realized it before I turned on the 4 different water faucets/showers and toilet on the boat and did a lot of flushing through the faucet near the tank.
Reply
#8
Don't panic the diesel will not hurt a thing, in fact it will lube the top end of the engine, and clean the entire fuel system one end to the other. It will also clean all the carbon off the valves pistons etc. You have to get most of it out, and fill with fresh gas for it to run correctly again, but the little bit left over will be beneficial to the engine in the long run. I'd Drain what I can, fill with gas, change the fuel filter, and drive it. You'll probably find it runs better then it did before.  Wow  LOL!

Jack

PS we used to put a quart of diesel in the tank occasionally back in the old days especially if we had one that was carboned up real bad. So believe me it's all good. Except maybe you're bruised ego.
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  Much needed break!!! snellet 7 19,010 03-25-2012, 01:15 PM
Last Post: snellet
  Diagram needed Dennis Meyers 1 7,021 09-19-2011, 06:14 AM
Last Post: Masterblaster7212
  Need advice hiddenwitchs29 15 31,225 03-14-2011, 12:00 PM
Last Post: don29163
  Interior Trim Panels - OPINIONS NEEDED Mach 1 Club 7 17,258 02-18-2010, 02:16 AM
Last Post: Mach 1 Club

Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Latest Threads
My old Queensland Ambulance
Last Post: JTS71 Mach1
11-26-2022 01:46 AM
» Replies: 1
» Views: 38
WELCOME ALL NEW MEMBERS INTRODUCE YOURSE...
Last Post: JTS71 Mach1
08-31-2022 01:36 PM
» Replies: 82
» Views: 142509
1970 mach 1 matching numbers
Last Post: Kstweeter
08-31-2022 10:31 AM
» Replies: 1
» Views: 121
Brake booster/servo hose length
Last Post: JTS71 Mach1
08-23-2022 09:40 AM
» Replies: 7
» Views: 1033
New Member
Last Post: JTS71 Mach1
08-20-2022 11:18 AM
» Replies: 2
» Views: 342
smooth window operation on 70 Mach
Last Post: CUSTOMMISER
08-15-2022 12:10 PM
» Replies: 2
» Views: 340
Blinkers on solid
Last Post: busted21
08-09-2022 03:58 AM
» Replies: 14
» Views: 5377
Blinkers on solid when lights on.
Last Post: JTS71 Mach1
08-08-2022 12:06 PM
» Replies: 1
» Views: 673
351 cj running hot
Last Post: busted21
08-08-2022 12:13 AM
» Replies: 5
» Views: 1763
What's One More Iron In The Fire!
Last Post: Steven Harris
07-22-2022 01:39 PM
» Replies: 124
» Views: 216468
Major Winter projects
Last Post: JTS71 Mach1
07-09-2022 05:12 AM
» Replies: 49
» Views: 12901
Happy Fathers Day!!!
Last Post: JTS71 Mach1
06-20-2022 02:34 AM
» Replies: 0
» Views: 792
1969 Raven Black 390 Looking For
Last Post: mason1958
06-11-2022 09:48 AM
» Replies: 10
» Views: 12730
Looking For
Last Post: mason1958
06-03-2022 09:42 AM
» Replies: 0
» Views: 663
New
Last Post: Rare Pony
05-18-2022 01:54 PM
» Replies: 2
» Views: 896
Help/advice needed!!
Last Post: JTS71 Mach1
05-03-2022 03:42 AM
» Replies: 7
» Views: 2163
Base suspension alignment/setup
Last Post: JTS71 Mach1
04-27-2022 11:49 AM
» Replies: 1
» Views: 1027
Dash ignition light?
Last Post: JTS71 Mach1
04-11-2022 12:46 AM
» Replies: 5
» Views: 9534
Biden had to go to Hospital
Last Post: JTS71 Mach1
04-09-2022 02:02 AM
» Replies: 0
» Views: 2349
That new/old Jeep smell
Last Post: JTS71 Mach1
04-02-2022 08:28 PM
» Replies: 34
» Views: 17220

>