According to wikipedia, there is no such name as Pioneer on a Jeep, but...the word Pioneer was mentioned in relation to another type......
http://en.wikipedia.org/wiki/Jeep
So, is the engine really a 2.8 ? or the 2.5 4 cylinder ?
Only 2.8 I'm familiar with is a GM V6 like my S-10 Pickup has....
I think your wasting time checking for fuel issues cause we know your getting fuel and if it didn't start or atleast act like it wanted to with spraying starting fluid in it then you are lacking spark or the valve train is not functioning but I believe its in the ignition system personally. I think one guy mentioned a ignition control module in the distributor but check your coil wire to make sure its not burnt. I have seen loose coil wire connections burn the end behind the shield cover.
I mentioned the module early on when the 2.8 was mentioned, not knowing for sure if the engine was the GM V6.
And my money is on the module crapping out....
My S-10 is an '86 also, so it's likely the same engine......
Not sure if the Cam sprocket has the plastic teeth caps like other GM engines had back then, but being an '86 the plastic teeth would be brittle by now & failure prone....
I mentioned the module early on when the 2.8 was mentioned, not knowing for sure if the engine was the GM V6.
And my money is on the module crapping out....
My S-10 is an '86 also, so it's likely the same engine......
Sure is remember Amc built these its a mix and match of parts. As for timing gears i think they were long gone butt chaing could jump if its streched enough.
A quick refrence I mentioned would be bring #1 cylinder up to t.d.c. and pull the distributor cap off and see if it is pointing to the # plug that will tell you if the distributor gear is broken or off teeth. I agree with the module or coil seems to be a likely fix but gotta do your homework or throw parts at it. Im concerned with your check engine light not coming on when you rotate ignition on seems like thats another issue and could or could not be related. You have your work cut out but do the preliminary checks first.
Good call by radicalvette about using #1 at TDC and seeing where distributor rotor is pointed. If it's not on #1 where it should be, the timing chain has likely jumped on the cam sprocket. Been there a number of times on GM engines. It usually happens at idle or when engine is shut off, and not usually at road speed.
The plastic covered teeth on the cam sprocket is NOT one of GM's great ideas...
To find TDC on compression stroke, you need #1 spark plug ( or better yet all plugs ) out. Bumping the starter to get #1 pushing air out the plug hole is the simple way to get comp stroke & timing mark on damper pulley lined up ....
Good call by radicalvette about using #1 at TDC and seeing where distributor rotor is pointed. If it's not on #1 where it should be, the timing chain has likely jumped on the cam sprocket. Been there a number of times on GM engines. It usually happens at idle or when engine is shut off, and not usually at road speed.
The plastic covered teeth on the cam sprocket is NOT one of GM's great ideas...
To find TDC on compression stroke, you need #1 spark plug ( or better yet all plugs ) out. Bumping the starter to get #1 pushing air out the plug hole is the simple way to get comp stroke & timing mark on damper pulley lined up ....
How many miles on that engine ??
207,000 miles. I replaced the ignition module back in october of '14 as i wasn't getting any fire from the distributor but the coil was working. I threw another carb on it today and still no action. Put the old carb back on and ruled out anything fuel related. Also, so everyone knows this is the 2.8l v6 made by GM. I will do the TDC test tomorrow, thanks for pointing that out
By the way, it did start misfiring at idle pretty bad. Sometimes when I go to rotate it, if it's the first time of the day cranking it then it will fire for a quick second, but only a quick second. By the way, does anyone know how to adjust the distributor on these models? Thanks ahead!
Alright, i went ahead and did the TDC test (I couldn't wait) and found out this: There are 3 marks on the harmonic balancer. 2 slight scores and one deep score. Assuming the deep score was TDC, i went ahead and lined it up to the flute at the end of the measurement thing above the balancer. I pulled my cap off to find out that the rotor was pointed at the number 4 wire, according to the haynes manual. Ok, so i thought my timing chain had jumped significantly. But then, I was digging through some online forums earlier and found this on a blazer forum:
According to that image, my timing hasn't jumped at all and i was just an idiot and did my cables wrong. I'm going to put that theory to the test tomorrow and i'll post the results.
Alright, i went ahead and did the TDC test (I couldn't wait) and found out this: There are 3 marks on the harmonic balancer. 2 slight scores and one deep score. Assuming the deep score was TDC, i went ahead and lined it up to the flute at the end of the measurement thing above the balancer. I pulled my cap off to find out that the rotor was pointed at the number 4 wire, according to the haynes manual. Ok, so i thought my timing chain had jumped significantly. But then, I was digging through some online forums earlier and found this on a blazer forum:
According to that image, my timing hasn't jumped at all and i was just an idiot and did my cables wrong. I'm going to put that theory to the test tomorrow and i'll post the results.
It would make sense that your pointing at #4 if your bdc on the exhaust stroke with #1 instead of tdc on the compression stroke with #1... the rotor button will be 180 degrees off pointing at #4 at bdc on #1. If you rotate the crank one more time you should be bringing up tdc on #1 and pointing at #1. Did you pull number 1 plug and feel compression coming out of that cylinder when you aligned your timing mark on the balancer ? We need to get him some info on checking a coil as well as that ignition module. I think autozone can check that ignition module for free if you take it out. There is a pick up inside the distributor as well seperate from the module. You need to google how to test a distributor pick up and ignition module then how to test a coil. I have forgot alot of theses test because Distributorless ignition systems have been out along time now lol here is a link to start you off testing the distributor pick up etc... http://easyautodiagnostics.com/gm/4....ed-icm-tests-6
If you end up pulling the distributor make sure you refrence where the rotor is pointing for example #4 where your at now... then scribe a refrence mark on the base of the distributor and on the engine block for reinstalling correctly later cause as you pull ot up you will see the rotor button rotate backwards and pay attention to that cause when you reinstall it you will want to estimate that rotation so that when you push it back down into place the rotor button will line back up with #4 example if not repeat the process until it does and then align your ditributor to block refrence points which is your initial timing marks good luck and taking the distributor apart to replace the pick up coil is not bad all you have to do is drive out a roll pin at the bottom you will see it.
Good call by radicalvette about using #1 at TDC and seeing where distributor rotor is pointed. If it's not on #1 where it should be, the timing chain has likely jumped on the cam sprocket. Been there a number of times on GM engines. It usually happens at idle or when engine is shut off, and not usually at road speed.
The plastic covered teeth on the cam sprocket is NOT one of GM's great ideas...
To find TDC on compression stroke, you need #1 spark plug ( or better yet all plugs ) out. Bumping the starter to get #1 pushing air out the plug hole is the simple way to get comp stroke & timing mark on damper pulley lined up ....
How many miles on that engine ??
All I did was join for some technical advise lol... this was the first thread I weighed in on and would like to see this guy get going like yall... its nice to have people with the same vehicles who may have been where your at to weigh in and help out.
I mentioned the module early on when the 2.8 was mentioned, not knowing for sure if the engine was the GM V6.
And my money is on the module crapping out....
My S-10 is an '86 also, so it's likely the same engine......
Not sure if the Cam sprocket has the plastic teeth caps like other GM engines had back then, but being an '86 the plastic teeth would be brittle by now & failure prone....
I agree with you but we also need to check the pick up coil as well but good call.
