clatter sound when going up hill

[stillakid]

hey guys, so my bronco (95 302 e4od) has this problem where it makes a clattering sound during acceleration in 3rd and 4th gear. it is most noticeable while going up hill and sounds like my cylinders are knocking all at once. (ive never heard that but id say thats what it would sound like). thing is it only makes this noise when i accelerate and after i let off the gas it stops. also will do it a little bit if i floor it from a start. recent oil change, cleaned iac, cleaned air filter, new pcv valve, new fan clutch, also noticed it does it more often with the ac on. also does it at around 45 after the cruising motor speed slows it will do it and gets louder if i try to accelerate without taking my foot off the gas first. please help! also sounds like its coming from in front of and to the right of the driver seat.

[clifton l]

its called "spark knock", Id suggest a tune up if not a recent one done.
also might be a good time to check your timing if you know how, and have a timing light.
finally if you dont want do any of this, just buy premium gas next time its really really low, that will also take care of it.

[bschaef95]

Originally Posted by clifton l

its called "spark knock", Id suggest a tune up if not a recent one done.
also might be a good time to check your timing if you know how, and have a timing light.
finally if you dont want do any of this, just buy premium gas next time its really really low, that will also take care of it.

Pass on the premium gas idea IMO, it will be better (fuel mileage, performance, horsepower) to just get a full tune up.

[stillakid]

just replaced all my plugs maybe 300 miles ago, fresh oil change, wires are a year old, distributor is 2 yrs old, pulled codes came up with 172 - HEGO shows system always lean. 211-PIP circuit fault 212- loss of IDM input to PCM or spout grounded 334 - EGR closed voltage higher than expected. any of that help? ill try the premium today.

[stillakid]

also timing is dead on, checked that yesterday.

[stillakid]

also the engine in my truck is out of a 91 grand marquis, im still using all the same accessories except the water pump. will any of this be the problem?

[Gene1219]

Originally Posted by stillakid

also timing is dead on, checked that yesterday.

Is it advanced? if so what is it?

[bschaef95]

Pull codes on that bad boy and see if it is reporting anything.

[stillakid]

already pulled codes, their up there. it is 10degrees btc

[bschaef95]

Originally Posted by stillakid

already pulled codes, their up there. it is 10degrees btc

My bad, didn't read the post fully...

[clifton l]

the code reguarding the pip would be a good reason your having this issue.

[stillakid]

what would cause it? distributor? coil? should i upgrade to msd dist/coil?

[alhefner]

Originally Posted by stillakid

211-PIP circuit fault 212- loss of IDM input to PCM or spout grounded

I would be getting on this too...it could be your ICM, Crank position sensor, or camshaft position sensor according to what I have been reading in other forums and threads...also, check out the spout grounded possibility...

[stillakid]

i put premium in it and the noise went away, put some mid grade in it and its back.. maybe fuel pressure problem? brand new fuel filter.

[Mikey350]

Originally Posted by stillakid

i put premium in it and the noise went away, put some mid grade in it and its back.. maybe fuel pressure problem? brand new fuel filter.

It really sounds like you have the timing advanced too far. Try backing it off a couple of degrees.
Fuel delivery and fuel pressure would not be affected by premium versus regular.

[BroncoJoe19]

You need to be sure that you disconnect the SPOUT connector when you check your ignition timing, but with those codes I'd pull my ignition control module and have it tested.

[Seattle FSB]

With the codes you have, I would focus on PIP/ICM. See this link: Throttle Position Sensor Testing, Replacement and Adjustment

[BroncoJoe19]

Hey Seattle FSB,
I think that you linked to the wrong page.

I'm thinking that this one would be better for checking the ICM :)

http://www.fullsizebronco.com/forum/...05&postcount=9

[stillakid]

Originally Posted by Mikey350

It really sounds like you have the timing advanced too far. Try backing it off a couple of degrees.
Fuel delivery and fuel pressure would not be affected by premium versus regular.

ok i will try this, which way is to retard/advance timing?

[Gene1219]

Originally Posted by stillakid

ok i will try this, which way is to retard/advance timing?

You should get timing light so that you don't retard the timing it too much. I think factory it's set at 10* You could run 11-13* for a little performance gain. You really should use a timing light