The EGR solinoid on my 88 2.8 is all messed up. i disconected the entire solinoid and there seems to be no efect on the engine. What would happen if i disconected the EGR valve completly.

 

The solenoid's messed up, or the valve is messed up? The worst you'd do is set a service engine soon light (the EGR vacuum diagnostic switch would see "no vacuum", and trip an error code), you might get some pinging at cruising speeds (highway speed, low throttle), and your NOx emissions will go up.

The pinging would happen because when the ECM thinks the EGR is engaged, it slightly leans out the air/fuel mix. When exhaust gas re-enters the engine, it makes the engine run a bit richer, so the computer compensates. NOx's would go up because combustion temperature is lowered by the EGR; since the EGR isn't lowering combustion temp, you get extra NOx's.

But, bottom line is, you won't be hurting/ruining the engine. EGR is one of those nice emissions controls that doesn't degrade performance (it disengages at wide-open-throttle). I'd say to be "air friendly", to fix it and hook it back up, but it's your call!

 

The thing is i bought a new solinoid and put it in, nothing changed. Do you think the valve is bad.

 

What was the original problem?

 

I can't accelerate, and when I floor it the engine bogs down. In every gear other that park and neutral the rpms will only go up to 1000 with the throtle all the way down.
What I've replaced.
TPS
Plugs
wires
rotor
cap
EGR solinoid

Nothing has gotten any better. My next repair will be the harmonic balancer.

Any other ideas are apriciated.

 

Try the ignition module!

 

Well, the EGR solenoid shouldn't have affected it, since the EGR wouldn't have been activated anyway with a road speed less than 45ish mph and a "heavy foot" on the throttle.

Wait; do you mean the EGR solenoid, or the UFO-shaped EGR valve?

Did you check the timing?

Is the balancer physically ruined? I'd think if it were, you'd just get a hell of a vibration out of the motor... it should still run at high RPM's.

 

TomP i just failed a smog test because of high NO at 15 mph think it could be something messed up with the EGR?

 

I agree with TomP , that doesnt sound like an EGR problem unless it is completely shot and leaking that much vacuum, which I highly doubt .
It sounds like fuel delivery . Check your fuel pressure . It might be a clogged fuel or even air filter. I say air filter because if they get extremely dirty they will not pull any air through it causing a severe loss of power. Make sure nothing has sucked up into your air intake. Check for bad vacuum leaks.

If the engine pops and backfires than I would lean more towards the ignition module or crossed plugwires .

 

Engine popping and backfire means four things to me.
1) Vaccum leaks or
2) Stretched Timing chain over lots of miles. Adjust timing up 3-5* has done wonders for several of us V-6er's.
3)Ignition problems.
4) Or a combination

 

You may be looking at a clogged catalytic converter. My old Aspen clogged one up and it wouldn't get over 15 mph. If it sounds like a vacuum cleaner when you step it down, I would suspect it's clogged

 

Good Point MD

 

Its not the cat because I gutted it along time ago, and its not the exaust, I replace the whole exaust with a Flow Master system. The EGR solinoir is not even hooked up but the hose that goes from the valve to the intake is still on.
I'm putting a new distributor in tommarow, we'll see what that does.
Thanks for your help.

Aerodragon911

 

BTW - check your timing

 

I was just going to say the same thing, Horst!

And Blitzd4evr, it might be... EGR does reduce NOx. But I'm pretty sure that EGR doesn't even kick in until +40 MPH, with a warm engine, and the VSS reporting high speed, and the TPS reporting low throttle. I don't think the EGR would even activate at 15 mph.

You could check over your ignition system. One misfiring cylinder puts out enough pollution as 4 or 5 "normal" cars does! Was that the only thing you failed? Were any of the other numbers high? High HC & High CO = running rich, High HC alone = running lean. High HC also usually traces back to a misfiring cylinder; High CO usually becomes a clogged/dirty air filter.

 

oops replied w/o reading all the way down.