Is it safe to start this engine ?

Mongoose-99 · 05-28-2003, 04:01 AM

Gentlemen,

Fitted a new Bosch OEM fuel pump to my Weber carbed 71T. Problem - supplier sent me the wrong pump (right shape, connections - too much pressure).

When I eventually sussed the problem and put a gauge on to the pump - it went way over the 10psi limit on the scale - recommended pressure is I believe of the order of 2.5 - 3.5 psi.

Anyway - correct pump is en route.

Qn: When the high pressure pump was running (ign. on / coil disconected / engine not cranked over) - once full pressure had been reached, fuel seemed to come pouring out of every orifice on both banks of carbs - and I reckon in total about 1/2 pint of fuel in total ended up on the floor.

Having managed to avoid getting fried in the earlier 'oversight' I'd hate like hell now to see the either the car (or me) go up in flames, or damage something else.

Once the new pump is connected (and checked, and obviously all excess fuel dried off) - will it be safe to run the engine - or are there likely to be residual problems from the initial over-pressure and excess fuel - that I need to address before trying to start the engine this time ?

jpnovak · 05-28-2003, 04:24 AM

should be no problems as long as there is no gas running down the carbs. use the run-off to clean everything up. good luck and we are glad you did not catch the car on fire.

Joeaksa · 05-28-2003, 05:28 AM

Install the new pump, turn it on and look at the carbs. Make sure that one or more of the floats has not stuck in the "upper" position and is flowing fuel out the tops. If you let it sit for a minute or so and no leakage then everything should be fine...

Joe

Mongoose-99 · 05-29-2003, 01:04 AM

Jamie,Lynn & Joe,
- Would you believe this particular idiot was happily working at the fuel system (before it turned into a 'sprinkler' system in the garage - with a halon extinguisher safely locked in a jeep outside ...Will install correct pump this weekend and check leaks, overflow and oil situation.
Thanks for the advice.

Wayne 962 · Wayne 962's Garage

Here are some more tips too (changing the oil is good).

Run a filter right before the pump, run one in the engine compartment, and then run an individual mini filter right before each of the carbs - helps to keep them clean. Also get a pressure regulator placed after the pump so you can be assured you're not getting over-pressure on those (sensitive) float valves...

-Wayne