Fuel issue's

Ok replaced the vacuum hose behind the manifold (pressure reg etc) and adjusted the maf and so far so good but I will want till morning or a frosty one for final say

Adam

Quote:

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Originally Posted by Bundy

Please let me know how it goes. My brother in laws 1988 has nearly the same symptoms.
Put in a new coolant temp sensor and it runs a bit better but still no real improvement to consumption. Runs super rich when cold but once warm not to bad. Fine on a trip but around town terrible consumption two foot driving required when surging.

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How does it idle when warm?
I just fixed mine this weekend. It idled okay when I got it, but with a new thermostat started stalling out.
Looks like some previous owner adjusted the base idle to compensate for the thermostat opening early and keeping the engine cold. There were also air leaks through the plenum.

It's as much a case of finding what evil things previous owners have done and then undoing them as anything else.

Mine never ran cold, I run mine with no fan so she sits about half way unless stuck in traffic

I will keep you posted on my findings

The vacuum hose behind my chamber didn't leak but were full of cracks so they were replaced and I tested the vac advanced and all good

One note I thought the fuel pumps only operated when cranking the engine but mine seems to run all the time???


Adam

Quote:

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Originally Posted by agrojnr

Mine never ran cold, I run mine with no fan so she sits about half way unless stuck in traffic

I will keep you posted on my findings

The vacuum hose behind my chamber didn't leak but were full of cracks so they were replaced and I tested the vac advanced and all good

One note I thought the fuel pumps only operated when cranking the engine but mine seems to run all the time???


Adam

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Mine ran halfway on the gauge too. The gauges can't be trusted. Massive difference in heater temperature and coolant temp with the new thermostat.

Quote:

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Originally Posted by agrojnr

One note I thought the fuel pumps only operated when cranking the engine but mine seems to run all the time???


Adam

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The switch that runs the fuel pump is in your MAF. Ignition on, engine not running, take off the air cleaner assembly and poke the flapper and see if the pump switches on and off. The flap may be sticking. There is a second input to the fuel pump relay from the starting contact on the key switch which is quite separate.

Cool

Starting the car tonight before coming to work it did flood a little but cleared quicker than before so I will check the flap tomorrow when I get home from work
Is there anything I can lube/clean it with or just get some maf cleaner


Adam

Quote:

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Originally Posted by agrojnr

Cool

Starting the car tonight before coming to work it did flood a little but cleared quicker than before so I will check the flap tomorrow when I get home from work
Is there anything I can lube/clean it with or just get some maf cleaner


Adam

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maf cleaner is for electronic mafs not the old flapper type. The flap jams on dust, grit or it's got bent by a lpg backfire. Sometimes you can fix a sticking flap by gently levering it away from any sticking spots. There will be scrape marks if it's sticking.

Don't automatically assume its sticking until you've looked, the flap may be stopping slightly open against a bit of gasket for all you know.