OK... first, the 86.
Its a 2.8 MPFI, it wont start. I parked it a long while ago... like two months... with almost zero gas. Got into it one day, and it wouldnt start... put almost a half tank of gas into it. Still wont start. Changed fuel filter... still wont. I am getting fuel. I pulled a spark plug and checked for spark... I have spark. Now I am clueless... nothing was touched while the car sat. Anyone have any ideas?

Now, the 89.
Its an L98, bout it a little bit ago. When I start the car up, and let it idle, then shut it off, the car ownt start back up. What could cause this? I know I have any exhaust leak... where the cat should be (straight pipe... really bad job, last owner) could that cause it? Its got new plugs now... and runs good.

Thanks for all the help guys!
Tristan

 

Is the car (the 89) turning over when you try to start it? My uncle's truck used to do that. The starter would get hot and refuse to work. Just a thought, don't really know if I'm helpin much here.

 

Timing perhaps? Are you getting spark at any other plug? heh

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

The 89 cranks over.

As for the 86... I dunno... havent checked any other plugs.

 

Im going to go out on a Limb With the 89 Blade, Because I dont have any personal experiance here, But Maybe Leaky Injectors ?


As for the 2.8, If your getting spark, and Your getting Fuel, There is only one thing Missing that the motor Needs to Run. Timing.


is it Firing ?




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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

For the 2.8...
Make sure your getting adequate fuel pressure, also like the other people said, check the timing... basically just a process of elimination

good luck!


[This message has been edited by dans82bird (edited February 28, 2001).]

 

The timing was set a little bit before I parked the car... to factory specs.... and nothing was touched while the car sat, so I doubt its that.

FOr the 89, leaky injectors dont make any sense.... if hte car sits.., it starts... if the injectors were leaking... I doubt it would even do that.

 

It's your ignition coil or ignition related. I had the EXACT same problem with my 89 and it was the coil. Put a brand new stock unit and you'll never look back. (Accel crapped out on me as well)

Steve

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89 GTA G92
305 TPI WC 5spd w/3.45
Accel Cap & 8mm Taylor's
Custom 4" Cold Air Induction
Jet Airfoil
K&N Airfilter
160 deg stat/fan switch TB Bypass - Steel Rad
Cat back 3" Exhaust w/Terminator Muff.
HiGh FlOw Dynomax Cat
Spohn LCA's - KYB GR-2's
Autometer Vac+Oil Temp

 

Blade, Just because there was another post a few days back with the same xact problem, and leaky injectors was deemed the cause.

But, I was too Quick In My judgement. When You say it wont start back Up, Will it crank ? Does it fire ? Dosent start can apply to anything from my 1945 GPW with No engine trans or body In my backyard, To My Camaro On a Cold Morning.


More specific Por-Favor.


And you Still havent answed the Same question about the 2.8, Is it firing ?

Help Us Help You.




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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

Alright... the 89 cranks... but will not start.

The 86... it used to "catch" once in a while... hold an engine speed just enough to get it off the starter, and die, doesnt even do that now. When I checked it for spark, I got one, when I checked for fuel at the schrader valve, I got fuel. I dont know how else to explain this damn car.

 

This is all about the '86 2.8 ...

You checked for fuel... did you put a pressure gauge on it? The pump can still shoot fuel from the shraeder valve, but not have enough pressure to keep the car running.

How's the MAF sensor? Unplug the 3-wire connector, and hang it out of the way of the fan belts. Try to start the car- it will take two tries. The first time it'll die. The second time it'll run, but run "funny"- and that would mean the MAF crapped out.

Are the injectors firing? If the TPS dies, it can cause the car to start in "clear flood" mode. That's usually when the gas pedal is smashed to the floor- the engine will try to start, but it won't pulse the injectors.

I'm thinking it's fuel... timing wouldn't move on it's own with the car sitting there. Did a squirrel build a nest in the air filter box?


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!

 

Ill take it the 89 Does not fire.

Im gonna guess the Ignition Module.

how long does it take for it to start again ?

Do you get spark when its cranking and not starting ?

follow the logical path....


I wouldnt think it was timing either, Tom, But he did say he was getting fuel and spark

Prolly low fuel pressure.

These are the basic things you check! Fuel pressure, spark and timing! arrhg




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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

If the 89 fires once in a while and then wont start sometimes it's probably not the module since solid state devices usually work, or they don't. I point my finger at the pickup coil. It would be easier to score a tester distrib and see than to change it. You can probably get one from a junkyard (check late model trucks too) Mine had a similar prob and the pickup tested fine, but had an intermittant open when it warmed up. It wiped out modules 1 a week and had starting probs. It never stalled though. Shut it off and it wouldn't start until I changed the module and 1 week later it would do it again.

The six sounds like a fuel prob.