riddle me this

drmmr15 · 02-02-2007, 10:36 PM

Sorry to bump an old thread, but rnoswal seems to have good info. I have a problem. I removed my Cam Position Sensor, and am wondering how to set the Cam position sensor so I know its on the correct tooth? Pictures would greatly help

I am used to distributors, so any info would help. Thanks.

jeepkaiser65 · 02-03-2007, 05:46 AM

Im still not having any luck....I think its the air flow meter... I dunno....

IHateHacks · 02-03-2007, 05:11 PM

"The notch marks are align with cover #3. The balancer is at 0. The crown of the piston is at top, but the cam lobe is not visible in the oil filler neck"

The only thing that would cause this (as you described) would be someone putting the cam gears on the cams the wrong way. Have the gears been off the cams?

drmmr15-

This is where the cam sensor should be pointing with the engine at TDC and with the ignition timing set to 10 degrees BTDC. This is NOT how the sensor goes in as it turns as it meshes with the exhaust cam's cam sensor gear.

"If you run out of adjustment then pull it out and rotate it back or forward and try starting it up. You should be able to get it running. If it is backfiring and popping then it is about 180 degrees out so pull the cam postioning sensor, rotate it 180 and try it again"

Incorrect. If you take a distributor or cam sensor out, you must set the engine to TDC before you put it back in. You don't go pulling it out, turning it and sticking it back in.

jeepkaiser65 · 02-04-2007, 05:37 AM

Thats about how it looks

IHateHacks · 02-04-2007, 03:22 PM

That pic was for drmmr15. Remember drmmr15, the engine MUST be at TDC when the CPS looks like that. And while you have the CPS out I would replace the O-ring. It's a dealer only part and its $2.35. Takes 1 minute to change.

For you jeepkaiser65, I asked if the cam gears were taken off the cams recently? Because the way you describe your problem, it sounds like someone installed them the wrong way. There are 3 different holes in the camshaft to install the pin. The pin should be in the center hole of the camshaft AND the cam gear, and the center hole should line up with the marks on the No.2 timing belt cover.

You also said this- "I understand that its gotta be some kind of timing issue."

Remember there are 2 kinds of timing for every internal combustion engine, ignition timing, which, in this case, has to do with the Cam Position Sensor (which I knew wasn't your problem, you verified that), and there is valve timing, which has to do with the cams. You said it's something mechanical, and you are right.

jeepkaiser65 · 02-05-2007, 05:31 AM

oops sorry, I myself have not removed the cams, The P.O. said he had rebuilt it about a year or so ago, but from my veiw points of my previous work on it I'd disagree with him. Anyways I have took the cam covers and checked clearnes of the lobes. I will check to see if the pin holes line up though I am almost certain they are. If the timing marks on the cam gears line up does that automaticaly meen the cams are aligned with the rite hole?

IHateHacks · 02-05-2007, 02:57 PM

"If the timing marks on the cam gears line up does that automaticaly meen the cams are aligned with the rite hole?"

No. Because the cam gear itself can bolt to the cam in 3 different spots. The timing mark on the cam gear is in line with the middle hole of the cam gear. There is a hole to the right and left that if the pin was in, the cam would be about 20 degrees off when the timing marks were lined up.

If the cam gears were not removed since you last ran the engine you can rule that out.

02-02-2007, 10:36 PM	#1
drmmr15 3" Exhaust Join Date: Jul 2006 Location: Seattle, WA Posts: 73	Sorry to bump an old thread, but rnoswal seems to have good info. I have a problem. I removed my Cam Position Sensor, and am wondering how to set the Cam position sensor so I know its on the correct tooth? Pictures would greatly help I am used to distributors, so any info would help. Thanks. __________________ 1987 Supra Turbo GReddy TT Open Element Filter (<---not sure what brand) YAY BOOST!!!!....finally...

02-03-2007, 05:46 AM	#2
jeepkaiser65 3" Exhaust Join Date: Sep 2006 Location: san antonio Tx Posts: 68	Im still not having any luck....I think its the air flow meter... I dunno.... __________________ Id rather die on my feet then live on my knees

02-04-2007, 05:37 AM	#4
jeepkaiser65 3" Exhaust Join Date: Sep 2006 Location: san antonio Tx Posts: 68	Thats about how it looks __________________ Id rather die on my feet then live on my knees

02-04-2007, 03:22 PM	#5
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	That pic was for drmmr15. Remember drmmr15, the engine MUST be at TDC when the CPS looks like that. And while you have the CPS out I would replace the O-ring. It's a dealer only part and its $2.35. Takes 1 minute to change. For you jeepkaiser65, I asked if the cam gears were taken off the cams recently? Because the way you describe your problem, it sounds like someone installed them the wrong way. There are 3 different holes in the camshaft to install the pin. The pin should be in the center hole of the camshaft AND the cam gear, and the center hole should line up with the marks on the No.2 timing belt cover. You also said this- "I understand that its gotta be some kind of timing issue." Remember there are 2 kinds of timing for every internal combustion engine, ignition timing, which, in this case, has to do with the Cam Position Sensor (which I knew wasn't your problem, you verified that), and there is valve timing, which has to do with the cams. You said it's something mechanical, and you are right. Last edited by IHateHacks; 02-04-2007 at 03:40 PM.

02-05-2007, 05:31 AM	#6
jeepkaiser65 3" Exhaust Join Date: Sep 2006 Location: san antonio Tx Posts: 68	oops sorry, I myself have not removed the cams, The P.O. said he had rebuilt it about a year or so ago, but from my veiw points of my previous work on it I'd disagree with him. Anyways I have took the cam covers and checked clearnes of the lobes. I will check to see if the pin holes line up though I am almost certain they are. If the timing marks on the cam gears line up does that automaticaly meen the cams are aligned with the rite hole? __________________ Id rather die on my feet then live on my knees

02-03-2007, 05:11 PM	#3
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	"The notch marks are align with cover #3. The balancer is at 0. The crown of the piston is at top, but the cam lobe is not visible in the oil filler neck" The only thing that would cause this (as you described) would be someone putting the cam gears on the cams the wrong way. Have the gears been off the cams? drmmr15- This is where the cam sensor should be pointing with the engine at TDC and with the ignition timing set to 10 degrees BTDC. This is NOT how the sensor goes in as it turns as it meshes with the exhaust cam's cam sensor gear. "If you run out of adjustment then pull it out and rotate it back or forward and try starting it up. You should be able to get it running. If it is backfiring and popping then it is about 180 degrees out so pull the cam postioning sensor, rotate it 180 and try it again" Incorrect. If you take a distributor or cam sensor out, you must set the engine to TDC before you put it back in. You don't go pulling it out, turning it and sticking it back in. Last edited by IHateHacks; 02-03-2007 at 05:15 PM.

02-05-2007, 02:57 PM	#7
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	"If the timing marks on the cam gears line up does that automaticaly meen the cams are aligned with the rite hole?" No. Because the cam gear itself can bolt to the cam in 3 different spots. The timing mark on the cam gear is in line with the middle hole of the cam gear. There is a hole to the right and left that if the pin was in, the cam would be about 20 degrees off when the timing marks were lined up. If the cam gears were not removed since you last ran the engine you can rule that out.