Question about 1987 Pontiac Fiero

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87 fiero replaced distrubuter rotar plugs wires fuel pump & filter was idling rough and stalling had to hold pedal to the floor to start replaced tps and wont start cranks over wont start ?

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  • Pontiac Master
  • 11,471 Answers

Have you checked for spark at a plug wire ? Pull a plug wire off a spark plug an insert a screw driver in the end of the plug wire an hold close to metal on the engine , does it spark ? dist. module ! they failed a lot ! I know , I worked at a Pontiac dealer ship back then .

Posted on Mar 31, 2015

Testimonial: "It sparks and it would stsrt with the old tps but you would have to hold the pedal to the floor and it has no converter and wont start with the old tps now either"

  • Jeff Armer Apr 01, 2015

    Check for a 5 volt reference voltage at the TPS , gray wire !

  • Jeff Armer Apr 01, 2015

    May have short on 5volt reference circuit ! May have another sensor problem !

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 151 Answers

SOURCE: car runs rough at idle

clean out ur throttle body, just follow the hose from the air filter to the throttle body. Need 2 people to do this. Don't remove the hose completely from the throttle body. Just enuff to be able to spray ur intake cleaner into the throttle body. Do this especially if its worse when the motor is hot, as this would confirm the problem.

Posted on Sep 04, 2008

  • 383 Answers

SOURCE: 87 nissan starts then stalls

jdmbaker: There are a few areas I would suggest looking in.
First, I would be looking for a false air problem. This is a condition where you have un-metered air getting into the engine. A torn airflow meter boot, or large vacuum leak such as a split pcv hose.
Second, your injector pulse width is primarily dependent on the coolant temperature sensor. This component is located at the front of the motor just below the thermostat housing. The sensor gives the ECM resistance values based on the temperature of the coolant. If the sensor fails, usually, they have a tendency to create a lean condition. This shortens the pulse width of the injectors which essentially starves the engine for fuel. One way you can perform a quick test for a lean condition, is to pinch off the return hose for the fuel going to the tank. If you look at the fuel hoses, they run right next to each other. You have one which comes from the fuel filter. That is the feed line. Pinch the other hose. This will boost the fuel pressure causing more fuel to be sprayed out of the injectors.With the hose pinched, hit the throttle, if the engine will rev up, you persue the lean condition theory.
Third. Check for a weak spark. A severely worn cap and rotor or bad plug wires can cause a hesitation and stalling problem if they are bad enough.
Fourth. The air flow meter could be faulty. This is a very common symptom matching you description.
Odds are that one of these are the solution. Good luck and let me know how you do.

Posted on Jul 14, 2009

coriluv
  • 30 Answers

SOURCE: my fiero died, its a 2.5L and i literally replaced EVERYTHING!!

relay switch for your ignition

Posted on Jul 27, 2009

  • 474 Answers

SOURCE: 87 chevy 350 fuel injected pickup wont run smoothly

sounds like your egr valve is gummed up or bad. this is located behind the throttle body and has a single vaccum tube connected to it. if the diafram is still good you can remove it and clean it with WD 40 until the plunger works smooth

Posted on Nov 08, 2009

  • 1 Answer

SOURCE: 92 astro van 4.3l wont idle .starts then dies

It's the throtle position senser

Posted on Nov 30, 2010

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Ford focus 2003 zx3 still cuts out at idle does't stall and the check engine light is off


check out your throttle position sensor voltages w a scan tool , engine off key on, compare to specs given in auto repair manual for your car. Voltages should change smoothly in the specified range, if voltage takes a sudden jump or experiences a zero reading anywhere then the problem is the tps. When is the last time your fuel filter was changed ? Some of these are not replaceable without removing the fuel pump in the tank. When you put in the plugs did you also replace the wires? P.S an intermittent tps won't always leave a trouble code in the computer. Also clean out the throttle body and idle air control unit with an approved spray cleaner and a rag with engine off and key off. Have someone hold the throttle pedal to the floor to make this job easier. After cleaning hold gas pedal to the floor and start up then when engine starts, rev engine half way a couple of times to remove any excess carbon from the system then let engine idle. This should be done once every 6 months whether having idling problems or not, just to avoid having them. If the throttle body is dirty it can and will cause a stumble comparable to a miss.

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