Question about 1994 Ford Thunderbird

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1994 3.8 tbird No injector pulse, has fire and runs when spraying carb cleaner in intake

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You need to run a quick test on the engine control computer. You may also just have a defective electric fuel pump inside the fuel tank.

This will reveal any fault codes that might be present. Follow the instructions at the link EEC IV Self Test Ford Fuel Injection and EEC IV Electronic Engine Control...

Posted on Dec 09, 2016


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Posted on Jan 02, 2017

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SOURCE: 1993 jimmy 4.3 liter wont

Check the ignition module (located in distributor, under cap). These modules not only control ignition firing but also send a signal to pcm to control fuel injectors. They can become heat sensitive and fail intermittently. Most auto parts stores can check these modules if you remove and take them in.

Posted on Apr 03, 2009

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SOURCE: cannot get 1987 chevy van 20 to keep running... stalls out

Best do a fuel pressure test. Should have chg. fuel filter from the get go. The only other filter is on the end of the fuel pump in tank. Bad gas and dirty gas will plug up fuel filter, hense burn pump up.

Posted on Apr 11, 2009

  • 383 Answers

SOURCE: Little to no injector pulse only when starter is engaged

95-97 Maximas had a problem where condensation from the A/C would accumulate in the a/c evaporator case from the drain becoming restricted or blocked, When this would occur, condensation would drip onto the ECM and a problem would develop with misfire and/or starting. I would look at the ECM where the harness connects to it for corrosion problems. If you find it, there is a chemical spray which can be used to clean the terminals and/or you can clean them, although it is time consuming and difficult to due because of how small the terminals are. After things are cleaned up, lightly coat the connections with a dielectric grease. This will prevent electrolysis.I believe you can buy these at Radio shack and possibly at an automotive parts supplier.
Also a drop in voltage during the cranking phase will cause a weak spark. Your ignition is what pulses the injectors. It takes a minimum of 9.6 volts, but ideally you want at least 10.5 or more during the cranking phase if you want to get a spark worth anything. Check the voltage on the primary side of the coil while cranking the engine.
I'll watch to see if things work out for you, let me know. ....mybunkey

Posted on Apr 18, 2009

  • 92 Answers

SOURCE: 1994 Yukon running rich and flooding

Fuel pump circuit (low voltage)
Try replacing the fuel pump relay or testing it if you have the manual.

Posted on Sep 20, 2009

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Do you have fuel injector pulse? Try spraying starting fluid into the engine air intake, if it starts you have no injector pulse and thus no fuel delivery to the cylinders.

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Hey i was wondering what would be the problem with y van i just died and when i had it in the shp he said it was a fuel problem and i put in a new fuel pump and and fuel filter and there is still it is not...

Spray starting fluid or carb cleaner into the air intake to see if it really is a fuel problem. If it tries to start, like firing for a few seconds, it is probably not getting gas to the cylinders. Then you need to check the injector circuit. If fuel is getting up to the engine, then the pump is working, but maybe not good enough-check that by testing the fuel pressure. Hook up a fuel pressure gauge to the fuel rail, turn key to on, and you should see high pressure on the gauge, about 50 psi, but check for manufacturer specs for the correct pressure.

The injector circuit uses a fuse for the injectors, then it applies constant voltage to the injectors when the key is in on or run or start. See if you have voltage to the injectors with the key on. The injectors will pulse when the pcm momentarily grounds the injector circuit-it grounds each individual injector internally inside the computer for a split second. This causes the injector solenoid to energize and raises a pintle inside the injector so that fuel under pressure will spray out into the cylinder.

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