88 celica GT - Toyota Nation Forum : Toyota Car and Truck Forums

k_tieu · 08-19-2010, 01:34 PM

car has not been running in 6 years
cranks but no start
checked plugs they r dry
i get a 7.2 voltage reading from pump
weak battery?

i checked the COP relay that could be replaced but there must be some other problem for no fuel to be injected
plz help T techs

***MR2Jedi*** · 08-19-2010, 03:29 PM

I would definitely be using a fresh, fully charged battery for starting a vehicle thats been sitting that long.
Are the injectors firing? Stuck from old fuel gumming them up?

93celicaconv · 08-19-2010, 07:57 PM

Dumb thought here, but you might want to see if your timing belt broke? If it did, your distributor is not turning, and if it is not turning, your ECU is not getting any information that the engine is turning, so it will not activate the fuel injectors.

The engine would sound abnormal when trying to start it though, if the timing belt was broke. It wouldn't sound like "WA-WA-WA-WA-WA-WA-WA-etc.:" anymore. But it is worth a look to rule that out.

***MR2Jedi*** · 08-19-2010, 08:06 PM

Quote:

Originally Posted by 93celicaconv

Dumb thought here, but you might want to see if your timing belt broke? If it did, your distributor is not turning, and if it is not turning, your ECU is not getting any information that the engine is turning, so it will not activate the fuel injectors.

The engine would sound abnormal when trying to start it though, if the timing belt was broke. It wouldn't sound like "WA-WA-WA-WA-WA-WA-WA-etc.:" anymore. But it is worth a look to rule that out.

Not such a dumb thought. It could have dry rotted from sitting so long .
Though the engine would turn over much faster-if you had a fully charged battery.

k_tieu · 08-20-2010, 03:34 AM

yes i do hav a fresh battery in it
car wants to start but isnt tested fuel pump getting a 7 volt reading
fuel pump dosent make sound
cop relay seems fine but fuel isnt making its way to the injectors plugs r dry

93celicaconv · 08-23-2010, 06:18 AM

Why don't you remove the air supply hose from the throttle body, open up the throttle plate, and put a little gas in the throttle body past the the throttle plate. Then close the throttle plate and try starting the engine.

Does it start up and run for a second or 2? If so, then I agree, you have something wrong on the fuel side (fuel pump, filter, injectors, etc.).

toycello · 11-08-2010, 06:52 AM

whatever happened with this? curious - also what's a cop relay? I have a friend with an 84 celica in sort of a similar situation though I haven't gotten too far into it. No fuel seems like up front and no sound of a fuel pump - new battery and normal cranking sound so I'm guessing bad fuel pump from what I've read in the forum here... thoughts?

toycello · 11-08-2010, 06:53 AM

Wow - maybe next thing I'll try is: (just waking up here...

)

Why don't you remove the air supply hose from the throttle body, open up the throttle plate, and put a little gas in the throttle body past the the throttle plate. Then close the throttle plate and try starting the engine.

Does it start up and run for a second or 2? If so, then I agree, you have something wrong on the fuel side (fuel pump, filter, injectors, etc.).

toycello · 11-08-2010, 07:02 AM

just found these in another thread... maybe they'll apply... really should get a manual for this thing I guess. (RTFM?)

Quote:

Originally Posted by stepho

Sounds like either the fuel relay or the oil sender has gone.
The oil sender provides the ground for the fuel relay (a safety feature which automatically disables the fuel pump after an accident).
Buy the Haynes Celica RWD manual - it covers this subjects quite well.

Where the speedo cable screws into the back of the gauge cluster sometimes comes loose.
Tighten it up.
A bit tricky because you have to reach behind the dash and you can't see where your hand is going.

- Stepho

Quote:

Originally Posted by crissy_bowden

oh yeah, the fuel pump relay.... pop the hood, look down and to your left... you'll see the box that has the fuel pump relay in it... the box is labeled (square with 'fuel pump' written in it)... had to replace mine and according the the mechanic at toyota (had to get the relay from them) not all of the celicas require the relay... fuel pump issue... locate where the fuel pump relay goes, use a wire to connect the circuit and see if that fixes your problem...

k_tieu · 11-09-2010, 01:45 AM

Quote:

Originally Posted by toycello

whatever happened with this? curious - also what's a cop relay? I have a friend with an 84 celica in sort of a similar situation though I haven't gotten too far into it. No fuel seems like up front and no sound of a fuel pump - new battery and normal cranking sound so I'm guessing bad fuel pump from what I've read in the forum here... thoughts?

hey my problem turned out to be a dead pump car is running fine now

k_tieu · 11-09-2010, 01:48 AM

so wut i did was tested the plugs got a new rotor for the distributor
car started wit butaine
so i used a volt meter to measure voltage form the fuel sender wich is under the seats and didnt get the voltage i wanted and i used a thing i duno wuts it called but its lik headphones wit a needle i put that on the fuel sender didnt hear the pump run so i replaced the pump and tis all good